Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP6)

Announcement ID:	SUSE-SU-2026:2588-1
Release Date:	2026-06-23T13:38:27Z
Rating:	important
References:	bsc#1260907 bsc#1261640 bsc#1263088 bsc#1263902 bsc#1266229 bsc#1267625 bsc#1268282
Cross-References:	CVE-2026-23278 CVE-2026-31402 CVE-2026-31504 CVE-2026-31694 CVE-2026-43503 CVE-2026-46323
CVSS scores:	CVE-2026-23278 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-23278 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-23278 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-31402 ( SUSE ): 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N CVE-2026-31402 ( SUSE ): 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H CVE-2026-31402 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-31504 ( 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-2026-31504 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-31504 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-31694 ( 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-2026-31694 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-31694 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-43503 ( 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-2026-43503 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-43503 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-46323 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-46323 ( 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 Real Time 15 SP6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP6

An update that solves six vulnerabilities and has one security fix can now be installed.

Description:

This update for the SUSE Linux Enterprise Kernel 6.4.0-150600.23.81 fixes various security issues

The following security issues were fixed:

• CVE-2026-23278: netfilter: nf_tables: always walk all pending catchall elements (bsc#1260907).
• CVE-2026-31402: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache (bsc#1261640).
• CVE-2026-31504: net: fix fanout UAF in packet_release() via NETDEV_UP race (bsc#1263088).
• CVE-2026-31694: fuse: reject oversized dirents in page cache (bsc#1263902).
• CVE-2026-43503: final dirty.frag related fixes (bsc#1266229).
• CVE-2026-46323: net: gro: don't merge zcopy skbs (bsc#1268282).
• net/sched: fix pedit partial COW leading to page cache (bsc#1267625).

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-SP6-2026-2589=1 SUSE-SLE-Module-Live-Patching-15-SP6-2026-2588=1
• openSUSE Leap 15.6
  zypper in -t patch SUSE-2026-2588=1 SUSE-2026-2589=1

Package List:

• SUSE Linux Enterprise Live Patching 15-SP6 (ppc64le s390x x86_64)
  • kernel-livepatch-6_4_0-150600_23_81-default-8-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_73-default-10-150600.2.1
  • kernel-livepatch-SLE15-SP6_Update_16-debugsource-10-150600.2.1
  • kernel-livepatch-SLE15-SP6_Update_18-debugsource-8-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_73-default-debuginfo-10-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_81-default-debuginfo-8-150600.2.1
• openSUSE Leap 15.6 (ppc64le s390x x86_64)
  • kernel-livepatch-6_4_0-150600_23_81-default-8-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_73-default-10-150600.2.1
  • kernel-livepatch-SLE15-SP6_Update_16-debugsource-10-150600.2.1
  • kernel-livepatch-SLE15-SP6_Update_18-debugsource-8-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_73-default-debuginfo-10-150600.2.1
  • kernel-livepatch-6_4_0-150600_23_81-default-debuginfo-8-150600.2.1

References:

• https://www.suse.com/security/cve/CVE-2026-23278.html
• https://www.suse.com/security/cve/CVE-2026-31402.html
• https://www.suse.com/security/cve/CVE-2026-31504.html
• https://www.suse.com/security/cve/CVE-2026-31694.html
• https://www.suse.com/security/cve/CVE-2026-43503.html
• https://www.suse.com/security/cve/CVE-2026-46323.html
• https://bugzilla.suse.com/show_bug.cgi?id=1260907
• https://bugzilla.suse.com/show_bug.cgi?id=1261640
• https://bugzilla.suse.com/show_bug.cgi?id=1263088
• https://bugzilla.suse.com/show_bug.cgi?id=1263902
• https://bugzilla.suse.com/show_bug.cgi?id=1266229
• https://bugzilla.suse.com/show_bug.cgi?id=1267625
• https://bugzilla.suse.com/show_bug.cgi?id=1268282