SUSE-SU-2026:4183-1: important: Security update for the Linux Kernel (Live Patch 20 for SUSE Linux Enterprise 15 SP7)

[SLE-SECURITY-UPDATES]

# Security update for the Linux Kernel (Live Patch 20 for SUSE Linux Enterprise
15 SP7)

Announcement ID: SUSE-SU-2026:4183-1  
Release Date: 2026-09-15T07:33:58Z  
Rating: important  
References:

  * bsc#1274942
  * bsc#1275458

  
Cross-References:

  * CVE-2026-64423
  * CVE-2026-68138

  
CVSS scores:

  * CVE-2026-64423 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-64423 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-68138 ( 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-2026-68138 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2026-68138 ( 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 15.6
  * SUSE Linux Enterprise Live Patching 15-SP6
  * SUSE Linux Enterprise Live Patching 15-SP7
  * SUSE Linux Enterprise Real Time 15 SP6
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves two vulnerabilities can now be installed.

## Description:

This update for the SUSE Linux Enterprise Kernel 6.4.0-150700.53.78 fixes
various security issues:

The following security issues were fixed:

  * CVE-2026-64423: ipv4: igmp: remove multicast group from hash table on device
    destruction (bsc#1275458).
  * CVE-2026-68138: net/sched: serialize qdisc_rtab_list against concurrent
    get/put (bsc#1274942).

## 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 15-SP6  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP6-2026-4183

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-4183

  * SUSE Linux Enterprise Live Patching 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP7-2026-4184

## Package List:

  * SUSE Linux Enterprise Live Patching 15-SP6 (ppc64le s390x x86_64)
    * kernel-livepatch-6_4_0-150600_23_130-default-debuginfo-2-150600.2.1
    * kernel-livepatch-SLE15-SP6_Update_30-debugsource-2-150600.2.1
    * kernel-livepatch-6_4_0-150600_23_130-default-2-150600.2.1
  * openSUSE Leap 15.6 (ppc64le s390x x86_64)
    * kernel-livepatch-6_4_0-150600_23_130-default-debuginfo-2-150600.2.1
    * kernel-livepatch-SLE15-SP6_Update_30-debugsource-2-150600.2.1
    * kernel-livepatch-6_4_0-150600_23_130-default-2-150600.2.1
  * SUSE Linux Enterprise Live Patching 15-SP7 (ppc64le s390x x86_64)
    * kernel-livepatch-6_4_0-150700_53_78-default-2-150700.2.1
    * kernel-livepatch-6_4_0-150700_53_78-default-debuginfo-2-150700.2.1
    * kernel-livepatch-SLE15-SP7_Update_20-debugsource-2-150700.2.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-64423.html
  * https://www.suse.com/security/cve/CVE-2026-68138.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1274942
  * https://bugzilla.suse.com/show_bug.cgi?id=1275458

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