SUSE-SU-2026:0521-1: important: Security update for the Linux Kernel (Live Patch 71 for SUSE Linux Enterprise 12 SP5)

[SLE-SECURITY-UPDATES]

# Security update for the Linux Kernel (Live Patch 71 for SUSE Linux Enterprise
12 SP5)

Announcement ID: SUSE-SU-2026:0521-1  
Release Date: 2026-02-14T14:33:39Z  
Rating: important  
References:

  * bsc#1249205
  * bsc#1250280
  * bsc#1250314
  * bsc#1253439

  
Cross-References:

  * CVE-2023-53321
  * CVE-2025-38352
  * CVE-2025-40186

  
CVSS scores:

  * CVE-2023-53321 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2023-53321 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-53321 ( NVD ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  * CVE-2023-53321 ( NVD ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  * CVE-2025-38352 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-38352 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-38352 ( NVD ):  7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-40186 ( SUSE ):  7.3
    CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2025-40186 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP5
  * SUSE Linux Enterprise Live Patching 12-SP5
  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves three vulnerabilities and has one security fix can now be
installed.

## Description:

This update for the SUSE Linux Enterprise kernel 4.12.14-122.269 fixes various
security issues

The following security issues were fixed:

  * CVE-2023-53321: wifi: mac80211_hwsim: drop short frames (bsc#1250314).
  * CVE-2025-38352: posix-cpu-timers: fix race between handle_posix_cpu_timers()
    and posix_cpu_timer_del() (bsc#1249205).
  * CVE-2025-40186: tcp: Don't call reqsk_fastopen_remove() in
    tcp_conn_request() (bsc#1253439).

The following non security issue was fixed:

  * bsc#1250280: don't expose {file,inode}_operations with static lifetimes Fix
    issue with static lifetime empty_iops/no_open_fops by allocating them on the
    heap. Make sure previously assigned instances don't become dangling.
    (bsc#1250280).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Live Patching 12-SP5  
    zypper in -t patch SUSE-SLE-Live-Patching-12-SP5-2026-521=1 SUSE-SLE-Live-
Patching-12-SP5-2026-522=1 SUSE-SLE-Live-Patching-12-SP5-2026-523=1

## Package List:

  * SUSE Linux Enterprise Live Patching 12-SP5 (ppc64le s390x x86_64)
    * kgraft-patch-4_12_14-122_266-default-9-2.1
    * kgraft-patch-4_12_14-122_261-default-9-2.1
    * kgraft-patch-4_12_14-122_269-default-6-2.1

## References:

  * https://www.suse.com/security/cve/CVE-2023-53321.html
  * https://www.suse.com/security/cve/CVE-2025-38352.html
  * https://www.suse.com/security/cve/CVE-2025-40186.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1249205
  * https://bugzilla.suse.com/show_bug.cgi?id=1250280
  * https://bugzilla.suse.com/show_bug.cgi?id=1250314
  * https://bugzilla.suse.com/show_bug.cgi?id=1253439

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