Security update for the Linux Kernel

Announcement ID:	SUSE-SU-2026:3809-1
Release Date:	2026-08-26T10:44:29Z
Rating:	important
References:	bsc#1255616 bsc#1258340 bsc#1269289 bsc#1269773 bsc#1269986 bsc#1269988 bsc#1269993 bsc#1269997 bsc#1270059 bsc#1272268 bsc#1272855 bsc#1273742 bsc#1274072
Cross-References:	CVE-2023-53995 CVE-2026-23204 CVE-2026-52986 CVE-2026-53131 CVE-2026-53196 CVE-2026-53224 CVE-2026-53246 CVE-2026-53256 CVE-2026-53359 CVE-2026-63806 CVE-2026-63922 CVE-2026-63924 CVE-2026-64114 CVE-2026-64564
CVSS scores:	CVE-2023-53995 ( 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-2023-53995 ( 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 ( 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-2026-52986 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-52986 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53131 ( SUSE ): 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-53131 ( SUSE ): 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVE-2026-53131 ( NVD ): 9.4 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H CVE-2026-53196 ( SUSE ): 7.0 CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-53196 ( SUSE ): 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53196 ( NVD ): 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53196 ( NVD ): 6.8 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53224 ( 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-2026-53224 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-53224 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVE-2026-53246 ( SUSE ): 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N CVE-2026-53246 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H CVE-2026-53246 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53256 ( SUSE ): 7.7 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-53256 ( SUSE ): 7.5 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-53256 ( NVD ): 8.0 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-53359 ( SUSE ): 9.3 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVE-2026-53359 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-53359 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2026-63806 ( SUSE ): 5.9 CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-63806 ( SUSE ): 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVE-2026-63806 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVE-2026-63922 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-63922 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-63924 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-63924 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-64114 ( 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-2026-64114 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-64114 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-64564 ( 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-2026-64564 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2026-64564 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Server 11 SP4 SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE

An update that solves 14 vulnerabilities can now be installed.

Description:

The SUSE Linux Enterprise 11 SP4 kernel was updated to fix various security issues:

The following security issues were fixed:

• CVE-2023-53995: net: ipv4: fix one memleak in __inet_del_ifa() (bsc#1255616).
• CVE-2026-23204: net: add skb_header_pointer_careful() helper (bsc#1258340).
• CVE-2026-52986: netfilter: nf_conntrack_sip: don't use simple_strtoul (bsc#1269289).
• CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr() (bsc#1269773).
• CVE-2026-53196: USB: serial: io_ti: fix heap overflow in get_manuf_info() (bsc#1269986).
• CVE-2026-53224: sctp: validate embedded INIT chunk and address list lengths in cookie (bsc#1269997).
• CVE-2026-53246: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (bsc#1269988).
• CVE-2026-53256: Bluetooth: RFCOMM: hold listener socket in rfcomm_connect_ind() (bsc#1269993).
• CVE-2026-63806: KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned() (bsc#1272268).
• CVE-2026-63922: ipv6: exthdrs: recompute network header pointer once (bsc#1272855).
• CVE-2026-63924: ipv6: exthdrs: recompute network header pointer once (bsc#1272855).
• CVE-2026-64114: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 (bsc#1273742).
• CVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processing (bsc#1274072).

The following non security issues were fixed:

• scripts/cve_tools/kpm-bot: quote branch pattern properly.
• sctp: validate embedded address parameter length (git-fixes).

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 11 SP4 LTSS EXTREME CORE
  zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-3809=1
• SUSE Linux Enterprise Server 11 SP4
  zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-3809=1

Package List:

• SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (x86_64)
  • kernel-default-debugsource-3.0.101-108.216.1
  • kernel-ec2-debugsource-3.0.101-108.216.1
  • kernel-xen-debugsource-3.0.101-108.216.1
  • kernel-ec2-devel-debuginfo-3.0.101-108.216.1
  • kernel-trace-base-3.0.101-108.216.1
  • kernel-trace-debuginfo-3.0.101-108.216.1
  • kernel-xen-base-3.0.101-108.216.1
  • kernel-ec2-base-3.0.101-108.216.1
  • kernel-xen-devel-debuginfo-3.0.101-108.216.1
  • kernel-default-debuginfo-3.0.101-108.216.1
  • kernel-trace-devel-3.0.101-108.216.1
  • kernel-default-base-3.0.101-108.216.1
  • kernel-xen-devel-3.0.101-108.216.1
  • kernel-trace-debugsource-3.0.101-108.216.1
  • kernel-ec2-devel-3.0.101-108.216.1
  • kernel-default-devel-3.0.101-108.216.1
  • kernel-default-devel-debuginfo-3.0.101-108.216.1
  • kernel-xen-debuginfo-3.0.101-108.216.1
  • kernel-source-3.0.101-108.216.1
  • kernel-trace-devel-debuginfo-3.0.101-108.216.1
  • kernel-ec2-debuginfo-3.0.101-108.216.1
  • kernel-syms-3.0.101-108.216.1
• SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (nosrc x86_64)
  • kernel-ec2-3.0.101-108.216.1
  • kernel-trace-3.0.101-108.216.1
  • kernel-default-3.0.101-108.216.1
  • kernel-xen-3.0.101-108.216.1
• SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (noarch nosrc)
  • kernel-docs-3.0.101-108.216.1
• SUSE Linux Enterprise Server 11 SP4 (x86_64)
  • kernel-default-debugsource-3.0.101-108.216.1
  • kernel-ec2-debugsource-3.0.101-108.216.1
  • kernel-xen-debugsource-3.0.101-108.216.1
  • kernel-ec2-devel-debuginfo-3.0.101-108.216.1
  • kernel-trace-base-3.0.101-108.216.1
  • kernel-trace-debuginfo-3.0.101-108.216.1
  • kernel-xen-base-3.0.101-108.216.1
  • kernel-ec2-base-3.0.101-108.216.1
  • kernel-xen-devel-debuginfo-3.0.101-108.216.1
  • kernel-default-debuginfo-3.0.101-108.216.1
  • kernel-trace-devel-3.0.101-108.216.1
  • kernel-default-base-3.0.101-108.216.1
  • kernel-xen-devel-3.0.101-108.216.1
  • kernel-trace-debugsource-3.0.101-108.216.1
  • kernel-ec2-devel-3.0.101-108.216.1
  • kernel-default-devel-3.0.101-108.216.1
  • kernel-default-devel-debuginfo-3.0.101-108.216.1
  • kernel-xen-debuginfo-3.0.101-108.216.1
  • kernel-source-3.0.101-108.216.1
  • kernel-trace-devel-debuginfo-3.0.101-108.216.1
  • kernel-ec2-debuginfo-3.0.101-108.216.1
  • kernel-syms-3.0.101-108.216.1
• SUSE Linux Enterprise Server 11 SP4 (nosrc x86_64)
  • kernel-ec2-3.0.101-108.216.1
  • kernel-trace-3.0.101-108.216.1
  • kernel-default-3.0.101-108.216.1
  • kernel-xen-3.0.101-108.216.1
• SUSE Linux Enterprise Server 11 SP4 (noarch nosrc)
  • kernel-docs-3.0.101-108.216.1

References:

• https://www.suse.com/security/cve/CVE-2023-53995.html
• https://www.suse.com/security/cve/CVE-2026-23204.html
• https://www.suse.com/security/cve/CVE-2026-52986.html
• https://www.suse.com/security/cve/CVE-2026-53131.html
• https://www.suse.com/security/cve/CVE-2026-53196.html
• https://www.suse.com/security/cve/CVE-2026-53224.html
• https://www.suse.com/security/cve/CVE-2026-53246.html
• https://www.suse.com/security/cve/CVE-2026-53256.html
• https://www.suse.com/security/cve/CVE-2026-53359.html
• https://www.suse.com/security/cve/CVE-2026-63806.html
• https://www.suse.com/security/cve/CVE-2026-63922.html
• https://www.suse.com/security/cve/CVE-2026-63924.html
• https://www.suse.com/security/cve/CVE-2026-64114.html
• https://www.suse.com/security/cve/CVE-2026-64564.html
• https://bugzilla.suse.com/show_bug.cgi?id=1255616
• https://bugzilla.suse.com/show_bug.cgi?id=1258340
• https://bugzilla.suse.com/show_bug.cgi?id=1269289
• https://bugzilla.suse.com/show_bug.cgi?id=1269773
• https://bugzilla.suse.com/show_bug.cgi?id=1269986
• https://bugzilla.suse.com/show_bug.cgi?id=1269988
• https://bugzilla.suse.com/show_bug.cgi?id=1269993
• https://bugzilla.suse.com/show_bug.cgi?id=1269997
• https://bugzilla.suse.com/show_bug.cgi?id=1270059
• https://bugzilla.suse.com/show_bug.cgi?id=1272268
• https://bugzilla.suse.com/show_bug.cgi?id=1272855
• https://bugzilla.suse.com/show_bug.cgi?id=1273742
• https://bugzilla.suse.com/show_bug.cgi?id=1274072