SUSE-SU-2026:1231-1: important: Security update for the Linux Kernel (Live Patch 48 for SUSE Linux Enterprise 15 SP4)

[SLE-UPDATES]

# Security update for the Linux Kernel (Live Patch 48 for SUSE Linux Enterprise
15 SP4)

Announcement ID: SUSE-SU-2026:1231-1  
Release Date: 2026-04-09T09:04:40Z  
Rating: important  
References:

  * bsc#1258784

  
Cross-References:

  * CVE-2026-23209

  
CVSS scores:

  * CVE-2026-23209 ( SUSE ):  8.5
    CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-23209 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23209 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-23209 ( 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 one vulnerability can now be installed.

## Description:

This update for the SUSE Linux Enterprise Kernel 5.14.21-150400.24.194 fixes one
security issue

The following security issue was fixed:

  * CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink()
    (bsc#1258784).

## 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-2026-1231=1

  * SUSE Linux Enterprise Live Patching 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2026-1231=1

## Package List:

  * openSUSE Leap 15.4 (ppc64le s390x x86_64)
    * kernel-livepatch-5_14_21-150400_24_194-default-2-150400.2.1
    * kernel-livepatch-SLE15-SP4_Update_48-debugsource-2-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_194-default-debuginfo-2-150400.2.1
  * SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)
    * kernel-livepatch-5_14_21-150400_24_194-default-2-150400.2.1
    * kernel-livepatch-SLE15-SP4_Update_48-debugsource-2-150400.2.1
    * kernel-livepatch-5_14_21-150400_24_194-default-debuginfo-2-150400.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-23209.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1258784

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