Security update for the Linux Kernel (Live Patch 6 for SUSE Linux Enterprise 16)

Announcement ID: SUSE-SU-2026:21530-1
Release Date: 2026-05-05T22:36:52Z
Rating: important
References:
Cross-References:
CVSS scores:
  • 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-2026-23437 ( 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-2026-23437 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2026-23437 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE-2026-23437 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2026-31406 ( 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-2026-31406 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • CVE-2026-31406 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:
  • SUSE Linux Micro 6.2

An update that solves four vulnerabilities can now be installed.

Description:

This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.27.1 fixes various security issues

The following security issues were fixed:

  • CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful() (bsc#1259126).
  • CVE-2026-23437: net: shaper: protect late read accesses to the hierarchy (bsc#1261845).
  • CVE-2026-31406: xfrm: Fix work re-schedule after cancel in xfrm_nat_keepalive_net_fini() (bsc#1261630).
  • 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:

  • SUSE Linux Micro 6.2
    zypper in -t patch SUSE-SL-Micro-6.2-699=1

Package List:

  • SUSE Linux Micro 6.2 (ppc64le s390x x86_64)
    • kernel-livepatch-6_12_0-160000_27-default-debuginfo-3-160000.1.1
    • kernel-livepatch-6_12_0-160000_27-default-3-160000.1.1
    • kernel-livepatch-SLE16_Update_6-debugsource-3-160000.1.1

References: