The version of microvm-kernel installed on the remote host is prior to 4.14.246-200.474. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2MICROVM-KERNEL-4.14-2023-003 advisory.

    A flaw was found in the Linux kernel's implementation of wireless drivers using the Atheros chipsets.  An     attacker within wireless range could send crafted traffic leading to information disclosure.
    (CVE-2020-3702)

    A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the int_ctl field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. (CVE-2021-3653)

    A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the virt_ext field, this issue could allow a malicious L1 to     disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the     L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire     system, leak of sensitive data or potential guest-to-host escape. (CVE-2021-3656)

    A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem     with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be     accessible. (CVE-2021-3732)

    A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. (CVE-2021-3753)

    A flaw was found in the Linux kernel, where it incorrectly computes the access permissions of a shadow     page. This issue leads to a missing guest protection page fault. (CVE-2021-38198)

    A flaw was found in the Linux kernel that allows attackers to defeat an ASLR protection mechanism because     it prints a kernel pointer (i.e., the real IOMEM pointer). The highest threat from this vulnerability is     to confidentiality. (CVE-2021-38205)

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.

The version of microvm-kernel installed on the remote host is prior to 4.14.246-199.474. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2MICROVM-KERNEL-4.14-2023-002 advisory.

    A flaw was found in the Linux kernel's implementation of wireless drivers using the Atheros chipsets.  An     attacker within wireless range could send crafted traffic leading to information disclosure.
    (CVE-2020-3702)

    A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the int_ctl field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. (CVE-2021-3653)

    A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the virt_ext field, this issue could allow a malicious L1 to     disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the     L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire     system, leak of sensitive data or potential guest-to-host escape. (CVE-2021-3656)

    A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem     with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be     accessible. (CVE-2021-3732)

    A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. (CVE-2021-3753)

    A flaw was found in the Linux kernel, where it incorrectly computes the access permissions of a shadow     page. This issue leads to a missing guest protection page fault. (CVE-2021-38198)

    A flaw was found in the Linux kernel that allows attackers to defeat an ASLR protection mechanism because     it prints a kernel pointer (i.e., the real IOMEM pointer). The highest threat from this vulnerability is     to confidentiality. (CVE-2021-38205)

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.

An update of the linux package has been released.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-001504 advisory.

    A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

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

Note that Nessus has not tested for this issue 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-2021:3179-1 advisory.

  - An issue was discovered in the Linux kernel through 5.6.11. sg_write lacks an sg_remove_request call in a     certain failure case, aka CID-83c6f2390040. (CVE-2020-12770)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)

  - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the int_ctl field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. (CVE-2021-3653) (CVE-2021-3656, CVE-2021-3732,     CVE-2021-3753)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - In kernel/bpf/hashtab.c in the Linux kernel through 5.13.8, there is an integer overflow and out-of-bounds     write when many elements are placed in a single bucket. NOTE: exploitation might be impractical without     the CAP_SYS_ADMIN capability. (CVE-2021-38166)

  - arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access     permissions of a shadow page, leading to a missing guest protection page fault. (CVE-2021-38198)

  - drivers/usb/host/max3421-hcd.c in the Linux kernel before 5.13.6 allows physically proximate attackers to     cause a denial of service (use-after-free and panic) by removing a MAX-3421 USB device in certain     situations. (CVE-2021-38204)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - The mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used,     allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by     injecting a frame with 802.11a rates. (CVE-2021-38206)

  - drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to     cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about ten     minutes. (CVE-2021-38207)

  - net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in     any net namespace because these changes are leaked into all other net namespaces. This is related to the     NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls. (CVE-2021-38209)

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

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3972-1 advisory.

    The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes.

    The following security bugs were fixed:

    - Unprivileged BPF has been disabled by default to reduce attack surface as too many security issues have     happened in the past (jsc#SLE-22573)

      You can reenable via systemctl setting /proc/sys/kernel/unprivileged_bpf_disabled to 0.
    (kernel.unprivileged_bpf_disabled = 0)


    The following security bugs were fixed:

    - CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use     after free. This could lead to local escalation of privilege with System execution privileges needed. User     interaction is not needed for exploitation (bnc#1192045).
    - CVE-2021-31916: An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-     ioctl.c in the Multi-device driver module in the Linux kernel A bound check failure allowed an attacker     with special user (CAP_SYS_ADMIN) privilege 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 system     availability (bnc#1192781).
    - CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks     about UDP ports in use. (bsc#1191790)
    - CVE-2021-34981: Fixed file refcounting in cmtp when cmtp_attach_device fails. (bsc#1191961)
    - CVE-2021-3655: Fixed a missing size validations on inbound SCTP packets, which may have allowed the     kernel to read uninitialized memory (bsc#1188563).
    - CVE-2021-3715: Fixed a use-after-free in route4_change() in net/sched/cls_route.c (bsc#1190349).
    - CVE-2021-3760: Fixed a use-after-free vulnerability with the ndev->rf_conn_info object (bsc#1190067).
    - CVE-2021-42739: The firewire subsystem had a buffer overflow related to drivers/media/firewire/firedtv-     avc.c and drivers/media/firewire/firedtv-ci.c, because avc_ca_pmt mishandled bounds checking     (bsc#1184673).
    - CVE-2021-3542: Fixed heap buffer overflow in firedtv driver (bsc#1186063).
    - CVE-2021-42252: Fixed an issue inside aspeed_lpc_ctrl_mmap that could have allowed local attackers to     access the Aspeed LPC control interface to overwrite memory in the kernel and potentially execute     privileges (bnc#1190479).
    - CVE-2021-41864: Fixed prealloc_elems_and_freelist that allowed unprivileged users to trigger an eBPF     multiplication integer overflow with a resultant out-of-bounds write (bnc#1191317).
    - CVE-2021-42008: Fixed a slab out-of-bounds write in the decode_data function in     drivers/net/hamradio/6pack.c. Input from a process that had the CAP_NET_ADMIN capability could have lead     to root access (bsc#1191315).
    - CVE-2021-37159: Fixed use-after-free and a double free inside hso_free_net_device in     drivers/net/usb/hso.c when unregister_netdev is called without checking for the NETREG_REGISTERED state     (bnc#1188601).
    - CVE-2020-3702: Fixed a bug which could be triggered with specifically timed and handcrafted traffic and     cause internal errors in a WLAN device that lead to improper layer 2 Wi-Fi encryption with a consequent     possibility of information disclosure. (bnc#1191193)
    - CVE-2021-3752: Fixed a use after free vulnerability in the Linux kernel's bluetooth module.
    (bsc#1190023)
    - CVE-2021-40490: Fixed a race condition discovered in the ext4 subsystem that could leat to local     priviledge escalation. (bnc#1190159)
    - CVE-2021-3744: Fixed a bug which could allows attackers to cause a denial of service. (bsc#1189884)
    - CVE-2021-3764: Fixed a bug which could allows attackers to cause a denial of service. (bsc#1190534)
    - CVE-2021-3772: Fixed a remote denial of service in the SCTP stack, if the attacker can spoof IP     addresses and knows the IP-addresses and port numbers being used (bnc#1190351).
    - CVE-2018-9517: Fixed possible memory corruption due to a use after free in pppol2tp_connect     (bsc#1108488).
    - CVE-2019-3874: Fixed possible denial of service attack via SCTP socket buffer used by a userspace     applications (bnc#1129898).
    - CVE-2019-3900: Fixed an infinite loop issue while handling incoming packets in handle_rx()     (bnc#1133374).
    - CVE-2021-3640: Fixed a Use-After-Free vulnerability in function sco_sock_sendmsg() in the bluetooth     stack (bsc#1188172).
    - CVE-2021-3653: Missing validation of the `int_ctl` VMCB field and allows a malicious L1 guest to enable     AVIC support for the L2 guest. (bsc#1189399).
    - CVE-2021-3656: Missing validation of the the `virt_ext` VMCB field and allows a malicious L1 guest to     disable both VMLOAD/VMSAVE intercepts and VLS for the L2 guest (bsc#1189400).
    - CVE-2021-3679: A lack of CPU resource in tracing module functionality was found in the way user uses     trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use     this flaw to starve the resources causing denial of service (bnc#1189057).
    - CVE-2021-3732: Mounting overlayfs inside an unprivileged user namespace can reveal files (bsc#1189706).
    - CVE-2021-3753: Fixed race out-of-bounds in virtual terminal handling (bsc#1190025).
    - CVE-2021-3759: Unaccounted ipc objects in Linux kernel could have lead to breaking memcg limits and DoS     attacks (bsc#1190115).
    - CVE-2021-38160: Data corruption or loss could be triggered by an untrusted device that supplies a     buf->len value exceeding the buffer size in drivers/char/virtio_console.c (bsc#1190117)
    - CVE-2021-38198: arch/x86/kvm/mmu/paging_tmpl.h incorrectly computes the access permissions of a shadow     page, leading to a missing guest protection page fault (bnc#1189262).
    - CVE-2021-38204: drivers/usb/host/max3421-hcd.c allowed physically proximate attackers to cause a denial     of service (use-after-free and panic) by removing a MAX-3421 USB device in certain situations     (bnc#1189291).
    - CVE-2021-34556: Fixed side-channel attack via a Speculative Store Bypass via unprivileged BPF program     that could have obtain sensitive information from kernel memory (bsc#1188983).
    - CVE-2021-35477: Fixed BPF stack frame pointer which could have been abused to disclose content of     arbitrary kernel memory (bsc#1188985).
    - CVE-2020-12770: Fixed sg_remove_request call in a certain failure cases (bsc#1171420).
    - CVE-2021-3659: Fixed a NULL pointer dereference in llsec_key_alloc() in net/mac802154/llsec.c     (bsc#1188876).
    - CVE-2021-22543: Fixed improper handling of VM_IO|VM_PFNMAP vmas in KVM, which could bypass RO checks and     can lead to pages being freed while still accessible by the VMM and guest. This allowed users with the     ability to start and control a VM to read/write random pages of memory and can result in local privilege     escalation (bsc#1186482).
    - CVE-2021-37576: Fixed an issue on the powerpc platform, where a KVM guest OS user could cause host OS     memory corruption via rtas_args.nargs (bsc#1188838).
    - CVE-2020-0429: In l2tp_session_delete and related functions of l2tp_core.c, there is possible memory     corruption due to a use after free. This could lead to local escalation of privilege with System execution     privileges needed. (bsc#1176724).


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

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
181974	Amazon Linux 2 : microvm-kernel (ALASMICROVM-KERNEL-4.14-2023-003)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	high
182061	Amazon Linux 2 : microvm-kernel (ALASMICROVM-KERNEL-4.14-2023-002)	Nessus	Amazon Linux Local Security Checks	2023/9/27	2024/12/11	high
203838	Photon OS 3.0: Linux PHSA-2021-3.0-0316	Nessus	PhotonOS Local Security Checks	2024/7/24	2024/7/24	high
290571	Unity Linux 20.1070e Security Update: kernel (UTSA-2026-001504)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/16	medium
153541	openSUSE 15 Security Update : kernel (openSUSE-SU-2021:3179-1)	Nessus	SuSE Local Security Checks	2021/9/22	2023/11/30	high
155959	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:3972-1)	Nessus	SuSE Local Security Checks	2021/12/9	2025/9/24	high

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