Security update for the Linux Kernel

Announcement ID:	SUSE-SU-2026:1904-1
Release Date:	2026-05-17T15:22:35Z
Rating:	important
References:	bsc#1264013 bsc#1264449 bsc#1265209 bsc#1265308
Cross-References:	CVE-2025-54518 CVE-2026-43284 CVE-2026-46300 CVE-2026-46333
CVSS scores:	CVE-2025-54518 ( 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-2025-54518 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2025-54518 ( NVD ): 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVE-2026-43284 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-43284 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-43284 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-46300 ( SUSE ): 8.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-46300 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-46333 ( SUSE ): 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 Enterprise High Performance Computing 12 SP5 SUSE Linux Enterprise Live Patching 12-SP5 SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server 12 SP5 LTSS SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves four vulnerabilities can now be installed.

Description:

The SUSE Linux Enterprise 12 SP5 kernel was updated to fix various security issues

The following security issues were fixed:

• CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (bsc#1264013).
• CVE-2026-46300: net: skbuff: propagate shared-frag marker through pskb_copy() (bsc#1265209).
• CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags (bsc#1264449).
• CVE-2026-46333: Fixed logic bug in the Linux kernel's __ptrace_may_access() function (bsc#1265308).

Special Instructions and Notes:

• Please reboot the system after installing this update.

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 Server 12 SP5 LTSS
  zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-1904=1
• SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1904=1
• SUSE Linux Enterprise Live Patching 12-SP5
  zypper in -t patch SUSE-SLE-Live-Patching-12-SP5-2026-1904=1

Package List:

• SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
  • gfs2-kmp-default-debuginfo-4.12.14-122.307.1
  • dlm-kmp-default-4.12.14-122.307.1
  • kernel-default-base-debuginfo-4.12.14-122.307.1
  • dlm-kmp-default-debuginfo-4.12.14-122.307.1
  • gfs2-kmp-default-4.12.14-122.307.1
  • ocfs2-kmp-default-debuginfo-4.12.14-122.307.1
  • cluster-md-kmp-default-4.12.14-122.307.1
  • kernel-syms-4.12.14-122.307.1
  • kernel-default-debuginfo-4.12.14-122.307.1
  • kernel-default-base-4.12.14-122.307.1
  • kernel-default-devel-4.12.14-122.307.1
  • ocfs2-kmp-default-4.12.14-122.307.1
  • cluster-md-kmp-default-debuginfo-4.12.14-122.307.1
  • kernel-default-debugsource-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64 nosrc)
  • kernel-default-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS (noarch)
  • kernel-macros-4.12.14-122.307.1
  • kernel-source-4.12.14-122.307.1
  • kernel-devel-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS (s390x)
  • kernel-default-man-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS (x86_64)
  • kernel-default-devel-debuginfo-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
  • gfs2-kmp-default-debuginfo-4.12.14-122.307.1
  • dlm-kmp-default-4.12.14-122.307.1
  • kernel-default-base-debuginfo-4.12.14-122.307.1
  • dlm-kmp-default-debuginfo-4.12.14-122.307.1
  • gfs2-kmp-default-4.12.14-122.307.1
  • ocfs2-kmp-default-debuginfo-4.12.14-122.307.1
  • cluster-md-kmp-default-4.12.14-122.307.1
  • kernel-syms-4.12.14-122.307.1
  • kernel-default-debuginfo-4.12.14-122.307.1
  • kernel-default-base-4.12.14-122.307.1
  • kernel-default-devel-4.12.14-122.307.1
  • ocfs2-kmp-default-4.12.14-122.307.1
  • cluster-md-kmp-default-debuginfo-4.12.14-122.307.1
  • kernel-default-debugsource-4.12.14-122.307.1
  • kernel-default-devel-debuginfo-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (nosrc x86_64)
  • kernel-default-4.12.14-122.307.1
• SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (noarch)
  • kernel-macros-4.12.14-122.307.1
  • kernel-source-4.12.14-122.307.1
  • kernel-devel-4.12.14-122.307.1
• SUSE Linux Enterprise Live Patching 12-SP5 (nosrc)
  • kernel-default-4.12.14-122.307.1
• SUSE Linux Enterprise Live Patching 12-SP5 (ppc64le s390x x86_64)
  • kernel-default-kgraft-devel-4.12.14-122.307.1
  • kernel-default-debuginfo-4.12.14-122.307.1
  • kgraft-patch-4_12_14-122_307-default-1-8.5.1
  • kernel-default-kgraft-4.12.14-122.307.1
  • kernel-default-debugsource-4.12.14-122.307.1

References:

• https://www.suse.com/security/cve/CVE-2025-54518.html
• https://www.suse.com/security/cve/CVE-2026-43284.html
• https://www.suse.com/security/cve/CVE-2026-46300.html
• https://www.suse.com/security/cve/CVE-2026-46333.html
• https://bugzilla.suse.com/show_bug.cgi?id=1264013
• https://bugzilla.suse.com/show_bug.cgi?id=1264449
• https://bugzilla.suse.com/show_bug.cgi?id=1265209
• https://bugzilla.suse.com/show_bug.cgi?id=1265308