The SUSE Linux Enterprise 15 SP2 realtime kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).

CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).

CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required.
(bnc#1180812)

CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).

CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9141 advisory.

    - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Add sanity check for upper ptr_limit (Piotr Krysiuk)  [Orabug: 32656761]  {CVE-2020-27170}     {CVE-2020-27171}
    - bpf: Simplify alu_limit masking for pointer arithmetic (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Fix off-by-one for area size in creating mask to left (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Prohibit alu ops for pointer types not defining ptr_limit (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - selftests/bpf: Test access to bpf map pointer (Andrey Ignatov)  [Orabug: 32656761]  {CVE-2020-27170}     {CVE-2020-27171}
    - bpf: Fix truncation handling for mod32 dst reg wrt zero (Daniel Borkmann)  [Orabug: 32673813]     {CVE-2021-3444}
    - bpf: Fix 32 bit src register truncation on div/mod (Daniel Borkmann)  [Orabug: 32673813]     {CVE-2021-3444}
    - scsi: iscsi: Verify lengths on passthrough PDUs (Chris Leech)  [Orabug: 32603378]  {CVE-2021-27363}     {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Ensure sysfs attributes are limited to PAGE_SIZE (Chris Leech)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Report connection state in sysfs (Gabriel Krisman Bertazi)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output (Joe Perches)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Restrict sessions and handles to admin capabilities (Lee Duncan)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - drm/nouveau: bail out of nouveau_channel_new if channel init fails (Frantisek Hrbata)  [Orabug:
    32591559]  {CVE-2020-25639}

Tenable has extracted the preceding description block directly from the Oracle 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 remote Oracle Linux 7 / 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9140 advisory.

    - bpf, selftests: Fix up some test_verifier cases for unprivileged (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Add sanity check for upper ptr_limit (Piotr Krysiuk)  [Orabug: 32656761]  {CVE-2020-27170}     {CVE-2020-27171}
    - bpf: Simplify alu_limit masking for pointer arithmetic (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Fix off-by-one for area size in creating mask to left (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - bpf: Prohibit alu ops for pointer types not defining ptr_limit (Piotr Krysiuk)  [Orabug: 32656761]     {CVE-2020-27170} {CVE-2020-27171}
    - selftests/bpf: Test access to bpf map pointer (Andrey Ignatov)  [Orabug: 32656761]  {CVE-2020-27170}     {CVE-2020-27171}
    - bpf: Fix truncation handling for mod32 dst reg wrt zero (Daniel Borkmann)  [Orabug: 32673813]     {CVE-2021-3444}
    - bpf: Fix 32 bit src register truncation on div/mod (Daniel Borkmann)  [Orabug: 32673813]     {CVE-2021-3444}
    - scsi: iscsi: Verify lengths on passthrough PDUs (Chris Leech)  [Orabug: 32603378]  {CVE-2021-27363}     {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Ensure sysfs attributes are limited to PAGE_SIZE (Chris Leech)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Report connection state in sysfs (Gabriel Krisman Bertazi)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output (Joe Perches)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - scsi: iscsi: Restrict sessions and handles to admin capabilities (Lee Duncan)  [Orabug: 32603378]     {CVE-2021-27363} {CVE-2021-27364} {CVE-2021-27365}
    - drm/nouveau: bail out of nouveau_channel_new if channel init fails (Frantisek Hrbata)  [Orabug:
    32591559]  {CVE-2020-25639}
    - xen-blkback: fix error handling in xen_blkbk_map() (Jan Beulich)  [Orabug: 32492108]  {CVE-2021-26930}
    - xen-scsiback: dont handle error by BUG() (Jan Beulich)  [Orabug: 32492100]  {CVE-2021-26931}
    - xen-netback: dont handle error by BUG() (Jan Beulich)  [Orabug: 32492100]  {CVE-2021-26931}
    - xen-blkback: dont handle error by BUG() (Jan Beulich)  [Orabug: 32492100]  {CVE-2021-26931}
    - Xen/gntdev: correct error checking in gntdev_map_grant_pages() (Jan Beulich)  [Orabug: 32492092]     {CVE-2021-26932}
    - Xen/gntdev: correct dev_bus_addr handling in gntdev_map_grant_pages() (Jan Beulich)  [Orabug: 32492092]     {CVE-2021-26932}
    - Xen/x86: also check kernel mapping in set_foreign_p2m_mapping() (Jan Beulich)  [Orabug: 32492092]     {CVE-2021-26932}
    - Xen/x86: dont bail early from clear_foreign_p2m_mapping() (Jan Beulich)  [Orabug: 32492092]     {CVE-2021-26932}
    - nbd: freeze the queue while were adding connections (Josef Bacik)  [Orabug: 32447284]  {CVE-2021-3348}
    - futex: Handle faults correctly for PI futexes (Thomas Gleixner)  [Orabug: 32447185]  {CVE-2021-3347}
    - futex: Simplify fixup_pi_state_owner() (Thomas Gleixner)  [Orabug: 32447185]  {CVE-2021-3347}
    - futex: Use pi_state_update_owner() in put_pi_state() (Thomas Gleixner)  [Orabug: 32447185]     {CVE-2021-3347}
    - rtmutex: Remove unused argument from rt_mutex_proxy_unlock() (Thomas Gleixner)  [Orabug: 32447185]     {CVE-2021-3347}
    - futex: Provide and use pi_state_update_owner() (Thomas Gleixner)  [Orabug: 32447185]  {CVE-2021-3347}
    - futex: Replace pointless printk in fixup_owner() (Thomas Gleixner)  [Orabug: 32447185]  {CVE-2021-3347}
    - futex: Ensure the correct return value from futex_lock_pi() (Thomas Gleixner)  [Orabug: 32447185]     {CVE-2021-3347}
    - netfilter: add and use nf_hook_slow_list() (Florian Westphal)  [Orabug: 32372529]  {CVE-2021-20177}
    - target: fix XCOPY NAA identifier lookup (David Disseldorp)  [Orabug: 32374281]  {CVE-2020-28374}
    - mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start (Zhang Xiaohui)  [Orabug:
    32349202]  {CVE-2020-36158}
    - xen-blkback: set ring->xenblkd to NULL after kthread_stop() (Pawel Wieczorkiewicz)  [Orabug: 32260251]     {CVE-2020-29569}
    - xenbus/xenbus_backend: Disallow pending watch messages (SeongJae Park)  [Orabug: 32253408]     {CVE-2020-29568}
    - xen/xenbus: Count pending messages for each watch (SeongJae Park)  [Orabug: 32253408]  {CVE-2020-29568}
    - xen/xenbus/xen_bus_type: Support will_handle watch callback (SeongJae Park)  [Orabug: 32253408]     {CVE-2020-29568}
    - xen/xenbus: Add will_handle callback support in xenbus_watch_path() (SeongJae Park)  [Orabug: 32253408]     {CVE-2020-29568}
    - xen/xenbus: Allow watches discard events before queueing (SeongJae Park)  [Orabug: 32253408]     {CVE-2020-29568}
    - futex: Fix inode life-time issue (Peter Zijlstra)  [Orabug: 32233513]  {CVE-2020-14381}
    - lib/syscall: fix syscall registers retrieval on 32-bit platforms (Willy Tarreau)   {CVE-2020-28588}

Tenable has extracted the preceding description block directly from the Oracle 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 SUSE Linux Enterprise 12 SP5 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2021-20177: Fixed a kernel panic related to iptables string matching rules. A privileged user could insert a rule which could lead to denial of service (bnc#1180765).

CVE-2021-0342: In tun_get_user of tun.c, there is possible memory corruption due to a use after free. This could lead to local escalation of privilege with System execution privileges required.
(bnc#1180812)

CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).

CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-25211: Fixed a flaw where a local attacker was able to inject conntrack netlink configuration that could cause a denial of service or trigger the use of incorrect protocol numbers in ctnetlink_parse_tuple_filter (bnc#1176395).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2021-3348: Fixed a use-after-free in nbd_add_socket that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup (bnc#1181504).

CVE-2021-3347: A use-after-free was discovered in the PI futexes during fault handling, allowing local users to execute code in the kernel (bnc#1181349).

CVE-2020-25211: Fixed a buffer overflow in ctnetlink_parse_tuple_filter() which could be triggered by a local attackers by injecting conntrack netlink configuration (bnc#1176395).

CVE-2020-27835: A use-after-free in the infiniband hfi1 driver was found, specifically in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system (bnc#1179878).

CVE-2020-29569: Fixed a potential privilege escalation and information leaks related to the PV block backend, as used by Xen (bnc#1179509).

CVE-2020-29568: Fixed a denial of service issue, related to processing watch events (bnc#1179508).

CVE-2020-0444: Fixed a bad kfree due to a logic error in audit_data_to_entry (bnc#1180027).

CVE-2020-0465: Fixed multiple missing bounds checks in hid-multitouch.c that could have led to local privilege escalation (bnc#1180029).

CVE-2020-0466: Fixed a use-after-free due to a logic error in do_epoll_ctl and ep_loop_check_proc of eventpoll.c (bnc#1180031).

CVE-2020-4788: Fixed an issue with IBM Power9 processors could have allowed a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances (bsc#1177666).

CVE-2020-10781: A flaw was found in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device.
With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable (bnc#1173074).

CVE-2020-15436: Fixed a use after free vulnerability in fs/block_dev.c which could have allowed local users to gain privileges or cause a denial of service (bsc#1179141).

CVE-2020-27068: Fixed an out-of-bounds read due to a missing bounds check in the nl80211_policy policy of nl80211.c (bnc#1180086).

CVE-2020-25639: Fixed a NULL pointer dereference via nouveau ioctl (bnc#1176846).

CVE-2020-27777: Fixed a privilege escalation in the Run-Time Abstraction Services (RTAS) interface, affecting guests running on top of PowerVM or KVM hypervisors (bnc#1179107).

CVE-2020-27786: Fixed an out-of-bounds write in the MIDI implementation (bnc#1179601).

CVE-2020-27825: Fixed a race in the trace_open and buffer resize calls (bsc#1179960).

CVE-2020-29660: Fixed a locking inconsistency in the tty subsystem that may have allowed a read-after-free attack against TIOCGSID (bnc#1179745).

CVE-2020-29661: Fixed a locking issue in the tty subsystem that allowed a use-after-free attack against TIOCSPGRP (bsc#1179745).

CVE-2020-28974: Fixed a slab-out-of-bounds read in fbcon which could have been used by local attackers to read privileged information or potentially crash the kernel (bsc#1178589).

CVE-2020-28915: Fixed a buffer over-read in the fbcon code which could have been used by local attackers to read kernel memory (bsc#1178886).

CVE-2020-28374: Fixed a Linux SCSI target issue (bsc#1178372).

CVE-2020-25669: Fixed a use-after-free read in sunkbd_reinit() (bsc#1178182).

CVE-2020-29371: An issue was discovered in romfs_dev_read in fs/romfs/storage.c where uninitialized memory leaks to userspace (bnc#1179429).

CVE-2020-15437: Fixed a NULL pointer dereference which could have allowed local users to cause a denial of service(bsc#1179140).

CVE-2020-36158: Fixed a potential remote code execution in the Marvell mwifiex driver (bsc#1180559).

CVE-2020-11668: Fixed the mishandling of invalid descriptors in the Xirlink camera USB driver (bnc#1168952).

CVE-2019-20934: Fixed a use-after-free in show_numa_stats() because NUMA fault statistics were inappropriately freed (bsc#1179663).

CVE-2019-20806: Fixed a NULL pointer dereference in tw5864_handle_frame() in drivers/media/pci/tw5864/tw5864-video.c, which may cause denial of service (bnc#1172199).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A NULL pointer dereference flaw was found in the Linux kernel's GPU Nouveau driver functionality in     versions prior to 5.12-rc1 in the way the user calls ioctl DRM_IOCTL_NOUVEAU_CHANNEL_ALLOC. This flaw     allows a local user to crash the system. (CVE-2020-25639)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4949-1 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)

    It was discovered that the Nouveau GPU driver in the Linux kernel did not properly handle error conditions     in some situations. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2020-25639)

    Olivier Benjamin, Norbert Manthey, Martin Mazein, and Jan H. Schnherr discovered that the Xen     paravirtualization backend in the Linux kernel did not properly propagate errors to frontend drivers in     some situations. An attacker in a guest VM could possibly use this to cause a denial of service (host     domain crash). (CVE-2021-26930)

    Jan Beulich discovered that multiple Xen backends in the Linux kernel did not properly handle certain     error conditions under paravirtualization. An attacker in a guest VM could possibly use this to cause a     denial of service (host domain crash). (CVE-2021-26931)

    It was discovered that the fastrpc driver in the Linux kernel did not prevent user space applications from     sending kernel RPC messages. A local attacker could possibly use this to gain elevated privileges.
    (CVE-2021-28375)

    It was discovered that the Freescale Gianfar Ethernet driver for the Linux kernel did not properly handle     receive queue overrun when jumbo frames were enabled in some situations. An attacker could use this to     cause a denial of service (system crash). (CVE-2021-29264)

    It was discovered that the USB/IP driver in the Linux kernel contained race conditions during the update     of local and shared status. An attacker could use this to cause a denial of service (system crash).
    (CVE-2021-29265)

    It was discovered that the vDPA backend virtio driver in the Linux kernel contained a use-after-free     vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2021-29266)

    It was discovered that the TIPC protocol implementation in the Linux kernel did not properly validate     passed encryption key sizes. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2021-29646)

    It was discovered that a race condition existed in the netfilter subsystem of the Linux kernel when     replacing tables. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2021-29650)

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.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
145287	openSUSE Security Update : the Linux Kernel (openSUSE-2021-75)	Nessus	SuSE Local Security Checks	2021/1/25	2023/2/9	critical
146406	SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0427-1)	Nessus	SuSE Local Security Checks	2021/2/11	2024/1/22	high
148458	Oracle Linux 7 / 8 : Unbreakable Enterprise kernel-container (ELSA-2021-9141)	Nessus	Oracle Linux Local Security Checks	2021/4/13	2026/2/9	high
148459	Oracle Linux 7 / 8 : Unbreakable Enterprise kernel (ELSA-2021-9140)	Nessus	Oracle Linux Local Security Checks	2021/4/13	2026/2/9	high
146359	SUSE SLES12 Security Update : kernel (SUSE-SU-2021:0353-1)	Nessus	SuSE Local Security Checks	2021/2/10	2024/1/22	high
146474	SUSE SLES15 Security Update : kernel (SUSE-SU-2021:0438-1)	Nessus	SuSE Local Security Checks	2021/2/12	2023/2/9	critical
229957	Linux Distros Unpatched Vulnerability : CVE-2020-25639	Nessus	Misc.	2025/3/5	2026/7/17	medium
149411	Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-4949-1)	Nessus	Ubuntu Local Security Checks	2021/5/12	2024/8/27	high

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