SUSE-SU-2026:1718-1: important: Security update for the Linux Kernel (Live Patch 40 for SUSE Linux Enterprise 15 SP4)

Wed May 6 20:33:44 UTC 2026

# Security update for the Linux Kernel (Live Patch 40 for SUSE Linux Enterprise
15 SP4)

Announcement ID: SUSE-SU-2026:1718-1  
Release Date: 2026-05-06T12:33:52Z  
Rating: important  
References:

  * bsc#1252048
  * bsc#1258073
  * bsc#1258655
  * bsc#1259126
  * bsc#1263689

Cross-References:

  * CVE-2025-38375
  * CVE-2025-39977
  * CVE-2026-23004
  * CVE-2026-23204
  * CVE-2026-31431

CVSS scores:

  * CVE-2025-38375 ( 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-2025-38375 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-38375 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-39977 ( 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-2025-39977 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23004 ( 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-2026-23004 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23004 ( NVD ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-23004 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23204 ( SUSE ):  6.8
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-23204 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23204 ( NVD ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  * CVE-2026-23204 ( NVD ):  7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
  * CVE-2026-31431 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-31431 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:

  * openSUSE Leap 15.4
  * SUSE Linux Enterprise High Performance Computing 15 SP4
  * SUSE Linux Enterprise Live Patching 15-SP4
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Real Time 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4

An update that solves five vulnerabilities can now be installed.

## Description:

This update for the SUSE Linux Enterprise kernel 5.14.21-150400.24.164 fixes
various security issues

The following security issues were fixed:

  * CVE-2025-38375: virtio-net: ensure the received length does not exceed
    allocated size (bsc#1258073).
  * CVE-2025-39977: futex: Prevent use-after-free during requeue-PI
    (bsc#1252048).
  * CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and
    rt_del_uncached_list() (bsc#1258655).
  * CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful()
    (bsc#1259126).
  * CVE-2026-31431: crypto: algif_aead - Revert to operating out-of-place
    (bsc#1263689).

## 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:

  * openSUSE Leap 15.4  
    zypper in -t patch SUSE-2026-1718=1

  * SUSE Linux Enterprise Live Patching 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2026-1718=1

## Package List:

  * openSUSE Leap 15.4 (ppc64le s390x x86_64)
    * kernel-livepatch-SLE15-SP4_Update_40-debugsource-18-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_164-default-debuginfo-18-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_164-default-18-150400.2.1
  * SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)
    * kernel-livepatch-SLE15-SP4_Update_40-debugsource-18-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_164-default-debuginfo-18-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_164-default-18-150400.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-38375.html
  * https://www.suse.com/security/cve/CVE-2025-39977.html
  * https://www.suse.com/security/cve/CVE-2026-23004.html
  * https://www.suse.com/security/cve/CVE-2026-23204.html
  * https://www.suse.com/security/cve/CVE-2026-31431.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1252048
  * https://bugzilla.suse.com/show_bug.cgi?id=1258073
  * https://bugzilla.suse.com/show_bug.cgi?id=1258655
  * https://bugzilla.suse.com/show_bug.cgi?id=1259126
  * https://bugzilla.suse.com/show_bug.cgi?id=1263689

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