The remote Ubuntu 21.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4950-1 advisory.

    Ryota Shiga discovered that the eBPF implementation in the Linux kernel did not properly verify that a BPF     program only reserved as much memory for a ring buffer as was allocated. A local attacker could use this     to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3489)

    Manfred Paul discovered that the eBPF implementation in the Linux kernel did not properly track bounds on     bitwise operations. A local attacker could use this to cause a denial of service (system crash) or execute     arbitrary code. (CVE-2021-3490)

    Billy Jheng Bing-Jhong discovered that the io_uring implementation of the Linux kernel did not properly     enforce the MAX_RW_COUNT limit in some situations. A local attacker could use this to cause a denial of     service (system crash) or execute arbitrary code. (CVE-2021-3491)

    Norbert Slusarek discovered that the CAN ISOTP protocol implementation in the Linux kernel contained a     race condition. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. Please note that to address this issue, SF_BROADCAST support was removed     temporarily from the CAN ISOTP implementation in Ubuntu 21.04 kernels. (LP: #1927409)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:1975-1 advisory.

  - An issue was discovered in the Linux kernel through 5.3.9. There is a use-after-free when aa_label_parse()     fails in aa_audit_rule_init() in security/apparmor/audit.c. (CVE-2019-18814)

  - In the Linux kernel 5.3.10, there is a use-after-free (read) in the perf_trace_lock_acquire function     (related to include/trace/events/lock.h). (CVE-2019-19769)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a     network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP,     CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
    (CVE-2020-24586)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary     can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent     Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
    Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an     adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

  - A vulnerability was found in Linux Kernel where refcount leak in llcp_sock_bind() causing use-after-free     which might lead to privilege escalations. (CVE-2020-25670)

  - A vulnerability was found in Linux Kernel, where a refcount leak in llcp_sock_connect() causing use-after-     free which might lead to privilege escalations. (CVE-2020-25671)

  - A memory leak vulnerability was found in Linux kernel in llcp_sock_connect (CVE-2020-25672)

  - A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

  - An issue was discovered in the kernel in NetBSD 7.1. An Access Point (AP) forwards EAPOL frames to other     clients even though the sender has not yet successfully authenticated to the AP. This might be abused in     projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier     to exploit other vulnerabilities in connected clients. (CVE-2020-26139)

  - An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The Wi-Fi implementation     does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can     abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-     confidentiality protocol. (CVE-2020-26141)

  - An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WEP, WPA, WPA2, and WPA3     implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process     them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets     independent of the network configuration. (CVE-2020-26145)

  - An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble     fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject     packets and/or exfiltrate selected fragments when another device sends fragmented frames and the WEP,     CCMP, or GCMP data-confidentiality protocol is used. (CVE-2020-26147)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-     of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects     pointer types that do not define a ptr_limit. (CVE-2020-27170)

  - An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error     (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to     side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory,     aka CID-10d2bb2e6b1d. (CVE-2020-27171)

  - An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users     can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.
    (CVE-2020-27673)

  - A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the     ability to set extended attributes to panic the system, causing memory corruption or escalating     privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-27815)

  - An out-of-bounds (OOB) memory access flaw was found in x25_bind in net/x25/af_x25.c in the Linux kernel     version v5.12-rc5. A bounds check failure allows a local attacker with a user account on the system to     gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information.
    The highest threat from this vulnerability is to confidentiality, integrity, as well as system     availability. (CVE-2020-35519)

  - An issue was discovered in the Linux kernel before 5.8. arch/x86/kvm/svm/svm.c allows a     set_memory_region_test infinite loop for certain nested page faults, aka CID-e72436bc3a52.
    (CVE-2020-36310)

  - An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a     denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering     many encrypted regions), aka CID-7be74942f184. (CVE-2020-36311)

  - An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a     kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d. (CVE-2020-36312)

  - An issue was discovered in the FUSE filesystem implementation in the Linux kernel before 5.10.6, aka     CID-5d069dbe8aaf. fuse_do_getattr() calls make_bad_inode() in inappropriate situations, causing a system     crash. NOTE: the original fix for this vulnerability was incomplete, and its incompleteness is tracked as     CVE-2021-28950. (CVE-2020-36322)

  - An out-of-bounds access flaw was found in the Linux kernel's implementation of the eBPF code verifier in     the way a user running the eBPF script calls dev_map_init_map or sock_map_alloc. This flaw allows a local     user to crash the system or possibly escalate their privileges. The highest threat from this vulnerability     is to confidentiality, integrity, as well as system availability. (CVE-2021-20268)

  - Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to     elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local     user with the CAP_NET_RAW capability. (CVE-2021-23134)

  - An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine     the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI     subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at     /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in     drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the     pointer to an iscsi_transport struct in the kernel module's global variables. (CVE-2021-27363)

  - An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is     adversely affected by the ability of an unprivileged user to craft Netlink messages. (CVE-2021-27364)

  - An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have     appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can     send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a     Netlink message. (CVE-2021-27365)

  - An issue was discovered in the Linux kernel through 5.11.3, as used with Xen PV. A certain part of the     netback driver lacks necessary treatment of errors such as failed memory allocations (as a result of     changes to the handling of grant mapping errors). A host OS denial of service may occur during misbehavior     of a networking frontend driver. NOTE: this issue exists because of an incomplete fix for CVE-2021-26931.
    (CVE-2021-28038)

  - An issue was discovered in the Linux kernel through 5.11.6. fastrpc_internal_invoke in     drivers/misc/fastrpc.c does not prevent user applications from sending kernel RPC messages, aka     CID-20c40794eb85. This is a related issue to CVE-2019-2308. (CVE-2021-28375)

  - rtw_wx_set_scan in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c in the Linux kernel through 5.11.6     allows writing beyond the end of the ->ssid[] array. NOTE: from the perspective of kernel.org releases,     CVE IDs are not normally used for drivers/staging/* (unfinished work); however, system integrators may     have situations in which a drivers/staging issue is relevant to their own customer base. (CVE-2021-28660)

  - The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use     uninitialized or stale values. This initialization went too far and may under certain conditions also     overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking     persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died,     leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable.
    XSA-365 was classified to affect versions back to at least 3.11. (CVE-2021-28688)

  - An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A stall on CPU can occur     because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1. (CVE-2021-28950)

  - An issue was discovered in the Linux kernel through 5.11.8. The sound/soc/qcom/sdm845.c soundwire device     driver has a buffer overflow when an unexpected port ID number is encountered, aka CID-1c668e1c0a0f. (This     has been fixed in 5.12-rc4.) (CVE-2021-28952)

  - A race condition was discovered in get_old_root in fs/btrfs/ctree.c in the Linux kernel through 5.11.8. It     allows attackers to cause a denial of service (BUG) because of a lack of locking on an extent buffer     before a cloning operation, aka CID-dbcc7d57bffc. (CVE-2021-28964)

  - In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel through 5.11.8 on some     Haswell CPUs, userspace applications (such as perf-fuzzer) can cause a system crash because the PEBS     status in a PEBS record is mishandled, aka CID-d88d05a9e0b6. (CVE-2021-28971)

  - In drivers/pci/hotplug/rpadlpar_sysfs.c in the Linux kernel through 5.11.8, the RPA PCI Hotplug driver has     a user-tolerable buffer overflow when writing a new device name to the driver from userspace, allowing     userspace to write data to the kernel stack frame directly. This occurs because add_slot_store and     remove_slot_store mishandle drc_name '\0' termination, aka CID-cc7a0bb058b8. (CVE-2021-28972)

  - BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements,     allowing them to execute arbitrary code within the kernel context. This affects     arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c. (CVE-2021-29154)

  - An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable     out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre     mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer     arithmetic operations, the pointer modification performed by the first operation is not correctly     accounted for when restricting subsequent operations. (CVE-2021-29155)

  - An issue was discovered in the Linux kernel through 5.11.10. drivers/net/ethernet/freescale/gianfar.c in     the Freescale Gianfar Ethernet driver allows attackers to cause a system crash because a negative fragment     size is calculated in situations involving an rx queue overrun when jumbo packets are used and NAPI is     enabled, aka CID-d8861bab48b6. (CVE-2021-29264)

  - An issue was discovered in the Linux kernel before 5.11.7. usbip_sockfd_store in     drivers/usb/usbip/stub_dev.c allows attackers to cause a denial of service (GPF) because the stub-up     sequence has race conditions during an update of the local and shared status, aka CID-9380afd6df70.
    (CVE-2021-29265)

  - An issue was discovered in the Linux kernel before 5.11.11. qrtr_recvmsg in net/qrtr/qrtr.c allows     attackers to obtain sensitive information from kernel memory because of a partially uninitialized data     structure, aka CID-50535249f624. (CVE-2021-29647)

  - An issue was discovered in the Linux kernel before 5.11.11. The netfilter subsystem allows attackers to     cause a denial of service (panic) because net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h     lack a full memory barrier upon the assignment of a new table value, aka CID-175e476b8cdf.
    (CVE-2021-29650)

  - An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in     drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.
    (CVE-2021-30002)

  - net/bluetooth/hci_request.c in the Linux kernel through 5.12.2 has a race condition for removal of the HCI     controller. (CVE-2021-32399)

  - In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an     hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic     operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel     memory, leading to local privilege escalation to root. In particular, there is a corner case where the off     reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
    (CVE-2021-33200)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when     the source register was known to be 0. A local attacker with the ability to load bpf programs could use     this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and     possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in     the upstream kernel in commit 9b00f1b78809 (bpf: Fix truncation handling for mod32 dst reg wrt zero) and     in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

  - A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice     into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest     threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions     before kernel 5.12-rc6 are affected (CVE-2021-3483)

  - The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size     was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel     and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny     reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier     support for it) (v5.8-rc1). (CVE-2021-3489)

  - The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly     update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and     therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (bpf: Fix alu32 const     subreg bound tracking on bitwise operations) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (bpf: Verifier, do     explicit ALU32 bounds tracking) (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (bpf:Fix a     verifier failure with xor) ( 5.10-rc1). (CVE-2021-3490)

  - The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the     PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc//mem.
    This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was     addressed via commit d1f82808877b (io_uring: truncate lengths larger than MAX_RW_COUNT on provide     buffers) (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was     introduced in ddf0322db79c (io_uring: add IORING_OP_PROVIDE_BUFFERS) (v5.7-rc1). (CVE-2021-3491)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4356 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):
    * kernel: out-of-bounds reads in pinctrl subsystem (CVE-2020-0427)
    * kernel: Improper input validation in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24502)
    * kernel: Insufficient access control in some Intel(R) Ethernet E810 Adapter drivers (CVE-2020-24503)
    * kernel: Uncontrolled resource consumption in some Intel(R) Ethernet E810 Adapter drivers     (CVE-2020-24504)
    * kernel: Fragmentation cache not cleared on reconnection (CVE-2020-24586)
    * kernel: Reassembling fragments encrypted under different keys (CVE-2020-24587)
    * kernel: wifi frame payload being parsed incorrectly as an L2 frame (CVE-2020-24588)
    * kernel: Forwarding EAPOL from unauthenticated wifi client (CVE-2020-26139)
    * kernel: accepting plaintext data frames in protected networks (CVE-2020-26140)
    * kernel: not verifying TKIP MIC of fragmented frames (CVE-2020-26141)
    * kernel: accepting fragmented plaintext frames in protected networks (CVE-2020-26143)
    * kernel: accepting unencrypted A-MSDU frames that start with RFC1042 header (CVE-2020-26144)
    * kernel: accepting plaintext broadcast fragments as full frames (CVE-2020-26145)
    * kernel: powerpc: RTAS calls can be used to compromise kernel integrity (CVE-2020-27777)
    * kernel: locking inconsistency in tty_io.c and tty_jobctrl.c can lead to a read-after-free     (CVE-2020-29660)
    * kernel: buffer overflow in mwifiex_cmd_802_11_ad_hoc_start function via a long SSID value     (CVE-2020-36158)
    * kernel: slab out-of-bounds read in hci_extended_inquiry_result_evt()  (CVE-2020-36386)
    * kernel: Improper access control in BlueZ may allow information disclosure vulnerability. (CVE-2021-0129)
    * kernel: Use-after-free in ndb_queue_rq() in drivers/block/nbd.c (CVE-2021-3348)
    * kernel: Linux kernel eBPF RINGBUF map oversized allocation (CVE-2021-3489)
    * kernel: double free in bluetooth subsystem when the HCI device initialization fails (CVE-2021-3564)
    * kernel: use-after-free in function hci_sock_bound_ioctl() (CVE-2021-3573)
    * kernel: eBPF 32-bit source register truncation on div/mod (CVE-2021-3600)
    * kernel: DoS in rb_per_cpu_empty() (CVE-2021-3679)
    * kernel: Mounting overlayfs inside an unprivileged user namespace can reveal files (CVE-2021-3732)
    * kernel: heap overflow in __cgroup_bpf_run_filter_getsockopt() (CVE-2021-20194)
    * kernel: Race condition in sctp_destroy_sock list_del (CVE-2021-23133)
    * kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode     (CVE-2021-28950)
    * kernel: System crash in intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c (CVE-2021-28971)
    * kernel: protection can be bypassed to leak content of kernel memory (CVE-2021-29155)
    * kernel: improper input validation in tipc_nl_retrieve_key function in net/tipc/node.c (CVE-2021-29646)
    * kernel: lack a full memory barrier may lead to DoS (CVE-2021-29650)
    * kernel: local escalation of privileges in handling of eBPF programs (CVE-2021-31440)
    * kernel: protection of stack pointer against speculative pointer arithmetic can be bypassed to leak     content of kernel memory (CVE-2021-31829)
    * kernel: out-of-bounds reads and writes due to enforcing incorrect limits for pointer arithmetic     operations by BPF verifier (CVE-2021-33200)
    * kernel: reassembling encrypted fragments with non-consecutive packet numbers (CVE-2020-26146)
    * kernel: reassembling mixed encrypted/plaintext fragments (CVE-2020-26147)
    * kernel: the copy-on-write implementation can grant unintended write access because of a race condition     in a THP mapcount check (CVE-2020-29368)
    * kernel: flowtable list del corruption with kernel BUG at lib/list_debug.c:50 (CVE-2021-3635)
    * kernel: NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c (CVE-2021-3659)
    * kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure (CVE-2021-20239)
    * kernel: out of bounds array access in drivers/md/dm-ioctl.c (CVE-2021-31916)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 5.10.35-31.135. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2022-001 advisory.

    2024-05-23: CVE-2021-46972 was added to this advisory.

    2024-05-23: CVE-2021-46974 was added to this advisory.

    2024-05-23: CVE-2021-46909 was added to this advisory.

    2024-04-25: CVE-2021-46922 was added to this advisory.

    2024-04-25: CVE-2021-46912 was added to this advisory.

    2024-04-25: CVE-2021-46908 was added to this advisory.

    2024-04-25: CVE-2021-46914 was added to this advisory.

    2024-04-25: CVE-2021-46971 was added to this advisory.

    2024-03-13: CVE-2021-46915 was added to this advisory.

    2024-03-13: CVE-2021-46904 was added to this advisory.

    2024-03-13: CVE-2021-46905 was added to this advisory.

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     performs manipulation with an unknown input for the llcp_sock_bind() function. This flaw allows a local     user to crash or escalate their privileges on the system. (CVE-2020-25670)

    A use-after-free flaw was found in the Linux kernel's NFC LLCP protocol implementation in the way the user     triggers the llcp_sock_connect() function. This flaw allows a local user to crash the system.
    (CVE-2020-25671)

    A memory leak in the Linux kernel's NFC LLCP protocol implementation was found in the way a user triggers     the llcp_sock_connect() function. This flaw allows a local user to starve the resources, causing a denial     of service. (CVE-2020-25672)

    A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak     and eventually hanging-up the system. (CVE-2020-25673)

    A use-after-free flaw was found in the Linux kernel's SCTP socket functionality that triggers a race     condition. This flaw allows a local user to escalate their privileges on the system. The highest threat     from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-23133)

    A vulnerability was discovered in retrieve_ptr_limit in kernel/bpf/verifier.c in the Linux kernel     mechanism to mitigate speculatively out-of-bounds loads (Spectre mitigation). In this flaw a local,     special user privileged (CAP_SYS_ADMIN) BPF program running on affected systems may bypass the protection,     and execute speculatively out-of-bounds loads from the kernel memory. This can be abused to extract     contents of kernel memory via side-channel. (CVE-2021-29155)

    A flaw was found in the Linux kernel's eBPF verification code. By default, accessing the eBPF verifier is     only accessible to privileged users with CAP_SYS_ADMIN. This flaw allows a local user who can insert eBPF     instructions, to use the eBPF verifier to abuse a spectre-like flaw and infer all system memory. The     highest threat from this vulnerability is to confidentiality. (CVE-2021-31829)

    The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size     was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel     and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny     reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier     support for it) (v5.8-rc1). (CVE-2021-3489)

    The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly     update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and     therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (bpf: Fix alu32 const     subreg bound tracking on bitwise operations) (v5.13-rc4) and backported to the stable kernels in v5.12.4,     v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (bpf: Verifier, do     explicit ALU32 bounds tracking) (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (bpf:Fix a     verifier failure with xor) ( 5.10-rc1). (CVE-2021-3490)

    A flaw was found in the Linux kernel.  The io_uring PROVIDE_BUFFERS operation allowed the MAX_RW_COUNT     limit to be bypassed, which led to negative values being used in mem_rw when reading /proc/<PID>/mem. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability. (CVE-2021-3491)

    A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API,     is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-     of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.
    (CVE-2021-3501)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix null-ptr-deref during tty device unregistration

    Multiple ttys try to claim the same the minor number causing a doubleunregistration of the same device.
    The first unregistration succeedsbut the next one results in a null-ptr-deref.

    The get_free_serial_index() function returns an available minor numberbut doesn't assign it immediately.
    The assignment is done by the callerlater. But before this assignment, calls to     get_free_serial_index()would return the same minor number.

    Fix this by modifying get_free_serial_index to assign the minor numberimmediately after one is found to be     and rename it to obtain_minor()to better reflect what it does. Similary, rename set_serial_by_index()to     release_minor() and modify it to free up the minor number of thegiven hso_serial. Every obtain_minor()     should have correspondingrelease_minor() call. (CVE-2021-46904)

    In the Linux kernel, the following vulnerability has been resolved:

    net: hso: fix NULL-deref on disconnect regression

    Commit 8a12f8836145 (net: hso: fix null-ptr-deref during tty deviceunregistration) fixed the racy minor     allocation reported by syzbot, butintroduced an unconditional NULL-pointer dereference on every     disconnectinstead.

    Specifically, the serial device table must no longer be accessed afterthe minor has been released by     hso_serial_tty_unregister(). (CVE-2021-46905)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Use correct permission flag for mixed signed bounds arithmetic

    We forbid adding unknown scalars with mixed signed bounds due to thespectre v1 masking mitigation. Hence     this also needs bypass_spec_v1flag instead of allow_ptr_leaks. (CVE-2021-46908)

    In the Linux kernel, the following vulnerability has been resolved:

    ARM: footbridge: fix PCI interrupt mapping (CVE-2021-46909)

    In the Linux kernel, the following vulnerability has been resolved:

    net: Make tcp_allowed_congestion_control readonly in non-init netns (CVE-2021-46912)

    In the Linux kernel, the following vulnerability has been resolved:

    ixgbe: fix unbalanced device enable/disable in suspend/resume (CVE-2021-46914)

    In the Linux kernel, the following vulnerability has been resolved:

    netfilter: nft_limit: avoid possible divide error in nft_limit_init

    div_u64() divides u64 by u32.

    nft_limit_init() wants to divide u64 by u64, use the appropriatemath function (div64_u64)

    divide error: 0000 [#1] PREEMPT SMP KASANCPU: 1 PID: 8390 Comm: syz-executor188 Not tainted     5.12.0-rc4-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google     01/01/2011RIP: 0010:div_u64_rem include/linux/math64.h:28 [inline]RIP: 0010:div_u64     include/linux/math64.h:127 [inline]RIP: 0010:nft_limit_init+0x2a2/0x5e0 net/netfilter/nft_limit.c:85Code:
    ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45     89 ed 31 d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00RSP:
    0018:ffffc90009447198 EFLAGS: 00010246RAX: 0000000000000000 RBX: 0000200000000000 RCX:
    0000000000000000RDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003RBP: ffff888020f80908     R08: 0000200000000000 R09: 0000000000000000R10: ffffffff875152d8 R11: 0000000000000000 R12:
    ffffc90009447270R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000FS:
    000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000CS:  0010 DS: 0000 ES: 0000 CR0:
    0000000080050033CR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0DR0: 0000000000000000     DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
    0000000000000400Call Trace:nf_tables_newexpr net/netfilter/nf_tables_api.c:2675     [inline]nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2713nft_set_elem_expr_alloc+0x27/0x280     net/netfilter/nf_tables_api.c:5160nf_tables_newset+0x1997/0x3150     net/netfilter/nf_tables_api.c:4321nfnetlink_rcv_batch+0x85a/0x21b0     net/netfilter/nfnetlink.c:456nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580     [inline]nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:598netlink_unicast_kernel     net/netlink/af_netlink.c:1312 [inline]netlink_unicast+0x533/0x7d0     net/netlink/af_netlink.c:1338netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927sock_sendmsg_nosec     net/socket.c:654 [inline]sock_sendmsg+0xcf/0x120 net/socket.c:674____sys_sendmsg+0x6e8/0x810     net/socket.c:2350___sys_sendmsg+0xf3/0x170 net/socket.c:2404__sys_sendmsg+0xe5/0x1b0     net/socket.c:2433do_syscall_64+0x2d/0x70     arch/x86/entry/common.c:46entry_SYSCALL_64_after_hwframe+0x44/0xae (CVE-2021-46915)

    In the Linux kernel, the following vulnerability has been resolved:

    KEYS: trusted: Fix TPM reservation for seal/unseal (CVE-2021-46922)

    In the Linux kernel, the following vulnerability has been resolved:

    perf/core: Fix unconditional security_locked_down() call (CVE-2021-46971)

    In the Linux kernel, the following vulnerability has been resolved:

    ovl: fix leaked dentry (CVE-2021-46972)

    In the Linux kernel, the following vulnerability has been resolved:

    bpf: Fix masking negation logic upon negative dst register (CVE-2021-46974)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

远程 Ubuntu 21.04 主机上安装的程序包受到 USN-4950-1 公告中提及的多个漏洞的影响。请注意，Nessus 尚未测试此问题，而是只依赖于应用程序自我报告的版本号。

远程 Redhat Enterprise Linux 8 主机上安装的程序包受到 RHSA-2021:4356 公告中提及的多个漏洞的影响。

  - kernel：Intel 显卡信息泄露。(CVE-2019-14615)

  - kernel：pinctrl 子系统中存在越界读取。(CVE-2020-0427)

  - kernel：某些 Intel (R) Ethernet E810 Adapter 驱动程序中存在输入验证不当问题 (CVE-2020-24502)

  - kernel：某些 Intel (R) Ethernet E810 Adapter 驱动程序中存在访问控制不充分问题 (CVE-2020-24503)

  - kernel：某些 Intel (R) Ethernet E810 Adapter 驱动程序中存在资源占用不受控制问题 (CVE-2020-24504)

  - kernel：重新连接时未清除碎片缓存 (CVE-2020-24586)

  - kernel：重组以不同密钥加密的片段 (CVE-2020-24587)

  - kernel：wifi 帧负载被错误解析为 L2 帧 (CVE-2020-24588)

  - kernel：从未认证的 wifi 客户端转发 EAPOL (CVE-2020-26139)

  - kernel：接受受保护网络中的明文数据帧 (CVE-2020-26140)

  - kernel：未验证碎片化帧的 TKIP MIC (CVE-2020-26141)

  - kernel：接受受保护网络中的碎片化明文帧 (CVE-2020-26143)

  - kernel：接受以 RFC1042 标头开头未加密的 A-MSDU 帧 (CVE-2020-26144)

  - kernel：接受纯文本广播片段作为完整帧 (CVE-2020-26145)

  - kernel：重组具有不连续数据包编号的加密片段 (CVE-2020-26146)

  - kernel：重组混合加密/明文片段 (CVE-2020-26147)

  - kernel：powerpc：RTAS 调用可用来破坏内核完整性 (CVE-2020-27777)

  - 内核：由于 THP 映射计数检查中的争用条件，写入时复制实现可授予非预期的写入访问权限 (CVE-2020-29368)

  - kernel：drivers/tty/tty_io.c 和 drivers/tty/tty_jobctrl.c 中的锁定不一致可导致释放后读取 (CVE-2020-29660)

  - kernel：通过长 SSID 值在 drivers/net/wireless/marvell/mwifiex/join.c 中的 mwifiex_cmd_802_11_ad_oc_start 函数中造成缓冲区溢出 (CVE-2020-36158)

  - kernel：virt/kvm/kvm_main.c 中的 kvm_io_bus_unregister_dev 函数会在 kmalloc 分配失败时造成内存泄漏 (CVE-2020-36312)

  - kernel：net/bluetooth/hci_event.c 中的 hci_extended_inquiry_result_evt() 存在 slab 越界读取问题 (CVE-2020-36386)

  - kernel：BlueZ 中的访问控制不当问题可能导致信息泄露漏洞。(CVE-2021-0129)

  - kernel：drivers/block/nbd.c 中的 ndb_queue_rq() 存在释放后使用问题 (CVE-2021-3348)

  - kernel：Linux 内核 eBPF RINGBUF 会映射超大分配 (CVE-2021-3489)

  - kernel：HCI 设备初始化失败时，蓝牙子系统中会发生双重释放 (CVE-2021-3564)

  - kernel：函数 hci_sock_bound_ioctl() 中存在释放后使用问题 (CVE-2021-3573)

  - kernel：div/mod 中存在 eBPF 32 位源寄存器截断 (CVE-2021-3600)

  - kernel：删除位于 lib/list_debug.c:50 的流表列表时出现内核错误，会导致列表损坏 (CVE-2021-3635)

  - kernel：net/mac802154/llsec.c 的 llsec_key_alloc() 中存在空指针取消引用 (CVE-2021-3659)

  - kernel：rb_per_cpu_empty() 中存在 DoS 问题 (CVE-2021-3679)

  - kernel：overlayfs：在非特权用户命名空间中挂载 overlayfs 可泄露文件 (CVE-2021-3732)

  - kernel：__cgroup_bpf_run_filter_getsockopt() 中存在堆溢出问题 (CVE-2021-20194)

  - kernel：setsockopt 系统调用不受信任的指针取消引用信息泄露 (CVE-2021-20239)

  - kernel：sctp_destroy_sock list_del 中存在争用条件 (CVE-2021-23133)

  - kernel：fuse：由于重试循环不断发现相同的不良 inode，导致 CPU 出现停止 (CVE-2021-28950)

  - kernel：arch/x86/events/intel/ds.c 中的 intel_pmu_drain_pebs_nhm 会导致系统崩溃 (CVE-2021-28971)

  - kernel：可绕过针对推测性越界加载的指针算术运算序列保护机制，以泄露内核内存内容 (CVE-2021-29155)

  - kernel：net/tipc/node.c 中的 tipc_nl_retrieve_key 函数存在输入验证不当问题 (CVE-2021-29646)

  - kernel：在 net/netfilter/x_tables.c 和 include/linux/netfilter/x_tables.h 中分配新的表值时缺少完整的内存屏障，可能导致 DoS (CVE-2021-29650)

  - kernel：处理 eBPF 程序时会发生本地权限升级问题 (CVE-2021-31440)

  - kernel：可绕过针对推测性指针算术的栈指针保护机制，以泄漏内核内存的内容 (CVE-2021-31829)

  - kernel：drivers/md/dm-ioctl.c 中存在越界数组访问问题 (CVE-2021-31916)

  - kernel：net/ipv4/cipso_ipv4.c 的 cipso_v4_genopt 中存在释放后使用问题 (CVE-2021-33033)

  - kernel：Intel(R) Ethernet ixgbe 驱动程序中存在输入验证不当漏洞，从而允许经过身份验证的用户通过本地访问 DoS (CVE-2021-33098)

  - kernel：由于 BPF 验证程序对指针算术运算执行错误限制，可导致越界读取和写入 (CVE-2021-33200)

  - kernel：sysfs 读取中可能存在缓冲区溢出 (CVE-2022-20166)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程主机上安装的内核版本低于 5.10.35-31.135。因此，会受到 ALAS2KERNEL-5.10-2022-001 公告中提及的多个漏洞影响。

    2024-05-23：已将 CVE-2021-46972 添加到此公告中。

    2024-05-23：已将 CVE-2021-46974 添加到此公告中。

    2024-05-23：已将 CVE-2021-46909 添加到此公告中。

    2024-04-25：已将 CVE-2021-46922 添加到此公告中。

    2024-04-25：已将 CVE-2021-46912 添加到此公告中。

    2024-04-25：已将 CVE-2021-46908 添加到此公告中。

    2024-04-25：已将 CVE-2021-46914 添加到此公告中。

    2024-04-25：已将 CVE-2021-46971 添加到此公告中。

    2024-03-13：已将 CVE-2021-46915 添加到此公告中。

    2024-03-13：已将 CVE-2021-46904 添加到此公告中。

    2024-03-13：已将 CVE-2021-46905 添加到此公告中。

    在 Linux 内核的 NFC LLCP 协议实现中，发现用户通过 llcp_sock_bind() 函数的未知输入执行操纵的方式中包含释放后使用缺陷。本地用户可利用此缺陷导致系统崩溃或升级其系统权限。(CVE-2020-25670)

    在 Linux 内核的 NFC LLCP 协议实现中，发现用户触发 llcp_sock_connect() 函数的方式中包含释放后使用缺陷。本地用户可以利用此缺陷造成系统崩溃。
    (CVE-2020-25671)

    在 Linux 内核的 NFC LLCP 协议实现中，发现用户触发 llcp_sock_connect() 函数的方式中包含内存流失缺陷。本地用户可利用此缺陷来耗尽资源，从而造成拒绝服务。(CVE-2020-25672)

    在 Linux 内核中发现一个漏洞，其中 llcp_sock_connect() 中的非阻塞套接字会造成内存流失并最终导致系统挂起。(CVE-2020-25673)

    在 Linux 内核的 SCTP 套接字功能中发现释放后使用缺陷，此缺陷可触发争用条件。本地用户可利用此缺陷升级其系统权限。此漏洞最大的威胁在于机密性、完整性，以及系统可用性。(CVE-2021-23133)

    在用于缓解推测性越界加载的 Linux 内核机制（Spectre 缓解）中，发现 kernel/bpf/verifier.c 的 retrieve_ptr_limit 中包含漏洞。在此缺陷中，受影响系统上运行的具有特殊用户权限 (CAP_SYS_ADMIN) 的本地 BPF 程序可绕过保护机制，从内核内存执行推测性越界加载。恶意用户可能会滥用此问题，通过边信道提取内核内存的内容。(CVE-2021-29155)

    在 Linux 内核的 eBPF 验证码中发现一个缺陷。默认情况下，只有具有 CAP_SYS_ADMIN 的特权用户才能访问 eBPF 验证程序。本地用户如果能够插入 eBPF 指令，即可使用 eBPF 验证程序来滥用类 spectre 缺陷，并推断所有系统内存。此漏洞最主要的威胁对象是机密性。(CVE-2021-31829)

    Linux 内核中的 eBPF RINGBUF bpf_ringbuf_reserve() 函数未检查分配的大小是否小于 ringbuf 大小，攻击者可利用此漏洞，在内核中进行越界写入，进而执行任意代码。此问题已通过提交 4b81ccebaeee (bpf, ringbuf：拒绝保留超过 ringbuf 大小的缓冲区) (v5.13-rc4) 修复，并向后移植到 v5.12.4、v5.11.21 和 v5.10.37 的稳定内核中。此问题经由 457f44363a88 (bpf：实现 BPF 环形缓冲区及其验证程序支持) (v5.8-rc1) 引入。(CVE-2021-3489)

    Linux 内核中按位操作（AND、OR 和 XOR）的 eBPF ALU32 边界跟踪未正确更新 32 位边界，这可能在 Linux 内核中造成越界读取和写入，继而导致任意代码执行问题。此问题已通过提交 049c4e13714e (bpf: 有关按位运算的 alu32 const subreg 边界跟踪修复) (v5.13-rc4) 修复，并向后移植到 v5.12.4、v5.11.21 和 v5.10.37 版的稳定内核中。AND/OR 问题由提交 3f50f132d840 (bpf：验证程序，执行明确的 ALU32 边界跟踪) (5.7-rc1) 引入，XOR 变体由 2921c90d4718 (bpf：使用 xor 修复验证程序失败) ( 5.10-rc1) 引入。(CVE-2021-3490)

    在 Linux 内核中发现一个缺陷。io_uring 的 PROVIDE_BUFFERS 运算允许绕过 MAX_RW_COUNT 限制，这会导致读取 /proc/<PID>/mem 时 mem_rw 中使用负值。此漏洞最大的威胁在于数据机密性和完整性，以及系统可用性。(CVE-2021-3491)

    在 5.12 之前版本的 Linux 内核中发现一个缺陷。KVM API 中的 internal.ndata 值映射到数组索引，而该索引可随时通过用户进程进行更新，可能导致越界写入。此漏洞对数据完整性和系统可用性威胁最大。
    (CVE-2021-3501)

    在 Linux 内核中，以下漏洞已修复：

    net：hso：修复 tty 设备取消注册期间的空指针取消引用漏洞

    多个 tty 尝试占用相同的次要编号，从而导致同一设备重复取消注册。
    第一次取消注册成功，但下一次会导致空指针取消引用。

    get_free_serial_index() 函数会返回可用的次要编号，但不会立即进行分配。
    稍后，会由调用程序完成分配。但在此分配之前，对 get_free_serial_index() 的调用会返回相同的次要编号。

    若要修复此问题，请修改 get_free_serial_index，以便在发现次要编号后立即进行分配，并将其重命名为 obtain_minor() 以更好地反映其功能。同样，将 set_serial_by_index() 重命名为 release_minor() 并进行修改，以释放给定 hso_serial 的次要编号。每个 obtain_minor() 都应具有相应的 release_minor() 调用。(CVE-2021-46904)

    在 Linux 内核中，以下漏洞已修复：

    net：hso：修复断开连接回归时的空指针取消引用漏洞

    提交 8a12f8836145 (net: hso: 修复 tty 设备取消注册期间的空指针取消引用漏洞) 修复了 syzbot 报告的 racy 次要分配，但在每次断开连接时会引入无条件的空指针取消引用。

    特别是，通过 hso_serial_tty_unregister() 释放次要设备后，不得再访问串行设备表。(CVE-2021-46905)

    在 Linux 内核中，以下漏洞已修复：

    bpf：对混合有符号的边界算法使用正确的权限标记

    由于采用了 thespectre v1 掩码缓解措施，我们禁止添加具有混合有符号边界的未知标量。因此，这也需要使用 bypass_spec_v1 标记，而不是 allow_ptr_leaks。(CVE-2021-46908)

    在 Linux 内核中，以下漏洞已修复：

    ARM：footbridge：修复 PCI 中断映射 (CVE-2021-46909)

    在 Linux 内核中，以下漏洞已修复：

    net：使 non-init netns 中的 tcp_allowed_congestion_control 设为只读 (CVE-2021-46912)

    在 Linux 内核中，以下漏洞已修复：

    ixgbe：修复“暂停/恢复”中不平衡的设备启用/禁用 (CVE-2021-46914)

    在 Linux 内核中，以下漏洞已修复：

    netfilter：nft_limit：避免 nft_limit_init

    div_u64() 用 u64 除以 u32 时可能产生的除法错误。

    nft_limit_init() 想要用 u64 除以 u64，请使用适当的数学函数 (div64_u64)

    divide error: 0000 [#1] PREEMPT SMP KASANCPU: 1 PID: 8390 Comm: syz-executor188 Not tainted 5.12.0-rc4-syzkaller #0Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011RIP: 0010:div_u64_rem include/linux/math64.h:28 [inline]RIP: 0010:div_u64 include/linux/math64.h:127 [inline]RIP: 0010:nft_limit_init+0x2a2/0x5e0 net/netfilter/nft_limit.c:85Code:
    ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45 89 ed 31 d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00RSP:
    0018:ffffc90009447198 EFLAGS: 00010246RAX: 0000000000000000 RBX: 0000200000000000 RCX:
    0000000000000000RDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003RBP: ffff888020f80908 R08: 0000200000000000 R09: 0000000000000000R10: ffffffff875152d8 R11: 0000000000000000 R12:
    ffffc90009447270R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000FS:
    000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000CS: 0010 DS: 0000 ES: 0000 CR0:
    0000000080050033CR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
    0000000000000400Call Trace:nf_tables_newexpr net/netfilter/nf_tables_api.c:2675 [inline]nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2713nft_set_elem_expr_alloc+0x27/0x280 net/netfilter/nf_tables_api.c:5160nf_tables_newset+0x1997/0x3150 net/netfilter/nf_tables_api.c:4321nfnetlink_rcv_batch+0x85a/0x21b0 net/netfilter/nfnetlink.c:456nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580 [inline]nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:598netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927sock_sendmsg_nosec net/socket.c:654 [inline]sock_sendmsg+0xcf/0x120 net/socket.c:674____sys_sendmsg+0x6e8/0x810 net/socket.c:2350___sys_sendmsg+0xf3/0x170 net/socket.c:2404__sys_sendmsg+0xe5/0x1b0 net/socket.c:2433do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46entry_SYSCALL_64_after_hwframe+0x44/0xae (CVE-2021-46915)

    在 Linux 内核中，以下漏洞已修复：

    KEYS：trusted：修复为密封/解封保留 TPM 的问题 (CVE-2021-46922)

    在 Linux 内核中，以下漏洞已修复：

    perf/core：修复无条件的 security_locked_down() 调用 (CVE-2021-46971)

    在 Linux 内核中，以下漏洞已修复：

    ovl：修复泄漏的 dentry (CVE-2021-46972)

    在 Linux 内核中，以下漏洞已修复：

    bpf：修复负 dst 寄存器时的掩码否定逻辑 (CVE-2021-46974)

Tenable 已直接从测试产品的安全公告中提取上述描述块。

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
149406	Ubuntu 21.04 : Linux kernel vulnerabilities (USN-4950-1)	Nessus	Ubuntu Local Security Checks	2021/5/12	2024/8/27	high
160459	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-002)	Nessus	Amazon Linux Local Security Checks	2022/5/2	2025/6/23	high
151730	openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1975-1)	Nessus	SuSE Local Security Checks	2021/7/16	2023/1/17	critical
155219	RHEL 8 : kernel (RHSA-2021:4356)	Nessus	Red Hat Local Security Checks	2021/11/11	2025/8/15	high
160443	Amazon Linux 2 : kernel (ALASKERNEL-5.10-2022-001)	Nessus	Amazon Linux Local Security Checks	2022/5/2	2024/12/11	high
149406	Ubuntu 21.04：Linux 内核漏洞 (USN-4950-1)	Nessus	Ubuntu Local Security Checks	2021/5/12	2024/8/27	high
155219	RHEL 8：内核 (RHSA-2021:4356)	Nessus	Red Hat Local Security Checks	2021/11/11	2025/8/15	high
160443	Amazon Linux 2：内核 (ALASKERNEL-5.10-2022-001)	Nessus	Amazon Linux Local Security Checks	2022/5/2	2024/12/11	high
160459	Amazon Linux 2：内核 (ALASKERNEL-5.10-2022-002)	Nessus	Amazon Linux Local Security Checks	2022/5/2	2025/6/23	high

检测

插件搜索

high

high

critical

high

high

high

high

high

high