ESB-2026.3066

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3066 Security update for the Linux Kernel 30 March 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2021-47110 CVE-2026-23089 CVE-2026-23191 CVE-2025-21738 CVE-2026-23074 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261130-1 Comment: CVSS (Max): 7.8 CVE-2025-21738 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.0% (12th) CVE-2025-21738 2026-03-29 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:1130-1 Release Date: 2026-03-27T15:47:44Z Rating: important o bsc#1221532 o bsc#1238917 References: o bsc#1257749 o bsc#1257790 o bsc#1258395 o CVE-2021-47110 o CVE-2025-21738 Cross-References: o CVE-2026-23074 o CVE-2026-23089 o CVE-2026-23191 o CVE-2021-47110 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:U/C:N/I:N/A:H o CVE-2021-47110 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:N/A:H o CVE-2025-21738 ( 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 o CVE-2025-21738 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2025-21738 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:N/I:N/A:H o CVE-2026-23074 ( 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 o CVE-2026-23074 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H CVSS scores: o CVE-2026-23074 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-23089 ( SUSE ): 5.2 CVSS:4.0/AV:P/AC:L/AT:N/PR:L /UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N o CVE-2026-23089 ( SUSE ): 5.9 CVSS:3.1/AV:P/AC:L/PR:L/UI:N /S:U/C:H/I:N/A:H o CVE-2026-23089 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-23191 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L /UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N o CVE-2026-23191 ( SUSE ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:U/C:H/I:N/A:H o CVE-2026-23191 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/ S:U/C:H/I:H/A:H Affected o SUSE Linux Enterprise Server 11 SP4 Products: o SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE An update that solves five vulnerabilities can now be installed. Description: The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security bugfixes. The following security bugs were fixed: o CVE-2021-47110: Fixed possible memory corruption when restoring from hibernation in x86/kvm (bsc#1221532). o CVE-2025-21738: ata: libata-sff: Ensure that we cannot write outside the allocated buffer (bsc#1238917). o CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc (bsc#1257749). o CVE-2026-23089: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free() (bsc#1257790). o CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258395). The following non-security bugs were fixed: o Disable CONFIG_NET_SCH_ATM (jsc#PED-12836). Special Instructions and Notes: o 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: o SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-1130=1 o SUSE Linux Enterprise Server 11 SP4 zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-1130=1 Package List: o SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (nosrc x86_64) kernel-ec2-3.0.101-108.204.1 kernel-default-3.0.101-108.204.1 kernel-xen-3.0.101-108.204.1 kernel-trace-3.0.101-108.204.1 o SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (x86_64) kernel-trace-devel-3.0.101-108.204.1 kernel-ec2-debuginfo-3.0.101-108.204.1 kernel-xen-debuginfo-3.0.101-108.204.1 kernel-xen-devel-3.0.101-108.204.1 kernel-ec2-base-3.0.101-108.204.1 kernel-trace-devel-debuginfo-3.0.101-108.204.1 kernel-default-devel-3.0.101-108.204.1 kernel-xen-base-3.0.101-108.204.1 kernel-syms-3.0.101-108.204.1 kernel-trace-base-3.0.101-108.204.1 kernel-default-debuginfo-3.0.101-108.204.1 kernel-default-debugsource-3.0.101-108.204.1 kernel-default-base-3.0.101-108.204.1 kernel-xen-devel-debuginfo-3.0.101-108.204.1 kernel-source-3.0.101-108.204.1 kernel-default-devel-debuginfo-3.0.101-108.204.1 kernel-ec2-debugsource-3.0.101-108.204.1 kernel-trace-debugsource-3.0.101-108.204.1 kernel-xen-debugsource-3.0.101-108.204.1 kernel-ec2-devel-3.0.101-108.204.1 kernel-ec2-devel-debuginfo-3.0.101-108.204.1 kernel-trace-debuginfo-3.0.101-108.204.1 o SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE (noarch nosrc) kernel-docs-3.0.101-108.204.1 o SUSE Linux Enterprise Server 11 SP4 (nosrc x86_64) kernel-ec2-3.0.101-108.204.1 kernel-default-3.0.101-108.204.1 kernel-xen-3.0.101-108.204.1 kernel-trace-3.0.101-108.204.1 o SUSE Linux Enterprise Server 11 SP4 (x86_64) kernel-trace-devel-3.0.101-108.204.1 kernel-ec2-debuginfo-3.0.101-108.204.1 kernel-xen-debuginfo-3.0.101-108.204.1 kernel-xen-devel-3.0.101-108.204.1 kernel-ec2-base-3.0.101-108.204.1 kernel-trace-devel-debuginfo-3.0.101-108.204.1 kernel-default-devel-3.0.101-108.204.1 kernel-xen-base-3.0.101-108.204.1 kernel-syms-3.0.101-108.204.1 kernel-trace-base-3.0.101-108.204.1 kernel-default-debuginfo-3.0.101-108.204.1 kernel-default-debugsource-3.0.101-108.204.1 kernel-default-base-3.0.101-108.204.1 kernel-xen-devel-debuginfo-3.0.101-108.204.1 kernel-source-3.0.101-108.204.1 kernel-default-devel-debuginfo-3.0.101-108.204.1 kernel-ec2-debugsource-3.0.101-108.204.1 kernel-trace-debugsource-3.0.101-108.204.1 kernel-xen-debugsource-3.0.101-108.204.1 kernel-ec2-devel-3.0.101-108.204.1 kernel-ec2-devel-debuginfo-3.0.101-108.204.1 kernel-trace-debuginfo-3.0.101-108.204.1 o SUSE Linux Enterprise Server 11 SP4 (noarch nosrc) kernel-docs-3.0.101-108.204.1 References: o https://www.suse.com/security/cve/CVE-2021-47110.html o https://www.suse.com/security/cve/CVE-2025-21738.html o https://www.suse.com/security/cve/CVE-2026-23074.html o https://www.suse.com/security/cve/CVE-2026-23089.html o https://www.suse.com/security/cve/CVE-2026-23191.html o https://bugzilla.suse.com/show_bug.cgi?id=1221532 o https://bugzilla.suse.com/show_bug.cgi?id=1238917 o https://bugzilla.suse.com/show_bug.cgi?id=1257749 o https://bugzilla.suse.com/show_bug.cgi?id=1257790 o https://bugzilla.suse.com/show_bug.cgi?id=1258395 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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