SUSE-SU-2026:1077-1: important: Security update for the Linux Kernel
SLE-SECURITY-UPDATES
null at suse.de
Thu Mar 26 20:39:05 UTC 2026
# Security update for the Linux Kernel
Announcement ID: SUSE-SU-2026:1077-1
Release Date: 2026-03-26T12:42:31Z
Rating: important
References:
* bsc#1238917
* bsc#1255075
* bsc#1256645
* bsc#1257231
* bsc#1257473
* bsc#1257732
* bsc#1257735
* bsc#1257749
* bsc#1257790
* bsc#1258340
* bsc#1258395
* bsc#1258518
* bsc#1258849
* bsc#1258850
* bsc#1259857
* jsc#PED-12836
Cross-References:
* CVE-2025-21738
* CVE-2025-40242
* CVE-2025-71066
* CVE-2026-23004
* CVE-2026-23054
* CVE-2026-23060
* CVE-2026-23074
* CVE-2026-23089
* CVE-2026-23191
* CVE-2026-23204
* CVE-2026-23209
* CVE-2026-23268
* CVE-2026-23269
CVSS scores:
* 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
* 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
* 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
* CVE-2025-40242 ( 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-2025-40242 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2025-71066 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23004 ( 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-2026-23004 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23004 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23054 ( SUSE ): 6.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-23054 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23060 ( SUSE ): 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-23060 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23060 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* 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
* 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
* 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
* 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
* 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
* 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
* 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
* 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
* 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
* 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-2026-23209 ( 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-2026-23209 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23209 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23268 ( 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-2026-23268 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23269 ( SUSE ): 6.9
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-23269 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Affected Products:
* openSUSE Leap 15.5
* SUSE Linux Enterprise Micro 5.5
An update that solves 13 vulnerabilities, contains one feature and has two
security fixes can now be installed.
## Description:
The SUSE Linux Enterprise 15 SP5 RT kernel was updated to fix various security
issues
The following security issues were fixed:
* CVE-2025-21738: ata: libata-sff: Ensure that we cannot write outside the
allocated buffer (bsc#1238917).
* CVE-2025-40242: gfs2: Fix unlikely race in gdlm_put_lock (bsc#1255075).
* CVE-2025-71066: net/sched: ets: Always remove class from active list before
deleting in ets_qdisc_change (bsc#1256645).
* CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and
rt_del_uncached_list() (bsc#1257231).
* CVE-2026-23060: crypto: authencesn - reject too-short AAD (assoclen<8) to
match ESP/ESN spec (bsc#1257735).
* CVE-2026-23074: net/sched: Enforce that teql can only be used as root qdisc
(bsc#1257749).
* CVE-2026-23089: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()
(bsc#1257790).
* CVE-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258395).
* CVE-2026-23204: net: add skb_header_pointer_careful() helper (bsc#1258340).
* CVE-2026-23209: macvlan: fix error recovery in macvlan_common_newlink()
(bsc#1258518).
* CVE-2026-23268: apparmor: fix unprivileged local user can do privileged
policy management (bsc#1258850).
* CVE-2026-23269: apparmor: validate DFA start states are in bounds in
unpack_pdb (bsc#1259857).
The following non security issues were fixed:
* apparmor: fix differential encoding verification (bsc#1258849).
* apparmor: Fix double free of ns_name in aa_replace_profiles() (bsc#1258849).
* apparmor: fix memory leak in verify_header (bsc#1258849).
* apparmor: fix missing bounds check on DEFAULT table in verify_dfa()
(bsc#1258849).
* apparmor: fix race between freeing data and fs accessing it (bsc#1258849).
* apparmor: fix race on rawdata dereference (bsc#1258849).
* apparmor: fix side-effect bug in match_char() macro usage (bsc#1258849).
* apparmor: fix unprivileged local user can do privileged policy management
(bsc#1258849).
* apparmor: fix: limit the number of levels of policy namespaces
(bsc#1258849).
* apparmor: replace recursive profile removal with iterative approach
(bsc#1258849).
* apparmor: validate DFA start states are in bounds in unpack_pdb
(bsc#1258849).
## 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:
* openSUSE Leap 15.5
zypper in -t patch SUSE-2026-1077=1
* SUSE Linux Enterprise Micro 5.5
zypper in -t patch SUSE-SLE-Micro-5.5-2026-1077=1
## Package List:
* openSUSE Leap 15.5 (noarch)
* kernel-source-rt-5.14.21-150500.13.124.1
* kernel-devel-rt-5.14.21-150500.13.124.1
* openSUSE Leap 15.5 (x86_64)
* kernel-rt-extra-5.14.21-150500.13.124.1
* kernel-syms-rt-5.14.21-150500.13.124.1
* kernel-rt-livepatch-5.14.21-150500.13.124.1
* kernel-rt-optional-5.14.21-150500.13.124.1
* kernel-rt_debug-devel-5.14.21-150500.13.124.1
* kernel-rt-debugsource-5.14.21-150500.13.124.1
* dlm-kmp-rt-5.14.21-150500.13.124.1
* kernel-rt-debuginfo-5.14.21-150500.13.124.1
* kernel-rt-optional-debuginfo-5.14.21-150500.13.124.1
* kernel-rt_debug-devel-debuginfo-5.14.21-150500.13.124.1
* kernel-rt-livepatch-devel-5.14.21-150500.13.124.1
* kernel-rt_debug-vdso-5.14.21-150500.13.124.1
* gfs2-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* kernel-rt-devel-5.14.21-150500.13.124.1
* gfs2-kmp-rt-5.14.21-150500.13.124.1
* kernel-rt_debug-debugsource-5.14.21-150500.13.124.1
* kernel-rt-vdso-debuginfo-5.14.21-150500.13.124.1
* kselftests-kmp-rt-5.14.21-150500.13.124.1
* kernel-rt-vdso-5.14.21-150500.13.124.1
* dlm-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* kernel-rt_debug-vdso-debuginfo-5.14.21-150500.13.124.1
* kernel-rt_debug-debuginfo-5.14.21-150500.13.124.1
* kernel-rt-devel-debuginfo-5.14.21-150500.13.124.1
* ocfs2-kmp-rt-5.14.21-150500.13.124.1
* reiserfs-kmp-rt-5.14.21-150500.13.124.1
* cluster-md-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* kselftests-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* reiserfs-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* ocfs2-kmp-rt-debuginfo-5.14.21-150500.13.124.1
* cluster-md-kmp-rt-5.14.21-150500.13.124.1
* kernel-rt-extra-debuginfo-5.14.21-150500.13.124.1
* openSUSE Leap 15.5 (nosrc x86_64)
* kernel-rt_debug-5.14.21-150500.13.124.1
* kernel-rt-5.14.21-150500.13.124.1
* SUSE Linux Enterprise Micro 5.5 (noarch)
* kernel-source-rt-5.14.21-150500.13.124.1
* kernel-devel-rt-5.14.21-150500.13.124.1
* SUSE Linux Enterprise Micro 5.5 (nosrc x86_64)
* kernel-rt-5.14.21-150500.13.124.1
* SUSE Linux Enterprise Micro 5.5 (x86_64)
* kernel-rt-debugsource-5.14.21-150500.13.124.1
* kernel-rt-debuginfo-5.14.21-150500.13.124.1
## References:
* https://www.suse.com/security/cve/CVE-2025-21738.html
* https://www.suse.com/security/cve/CVE-2025-40242.html
* https://www.suse.com/security/cve/CVE-2025-71066.html
* https://www.suse.com/security/cve/CVE-2026-23004.html
* https://www.suse.com/security/cve/CVE-2026-23054.html
* https://www.suse.com/security/cve/CVE-2026-23060.html
* https://www.suse.com/security/cve/CVE-2026-23074.html
* https://www.suse.com/security/cve/CVE-2026-23089.html
* https://www.suse.com/security/cve/CVE-2026-23191.html
* https://www.suse.com/security/cve/CVE-2026-23204.html
* https://www.suse.com/security/cve/CVE-2026-23209.html
* https://www.suse.com/security/cve/CVE-2026-23268.html
* https://www.suse.com/security/cve/CVE-2026-23269.html
* https://bugzilla.suse.com/show_bug.cgi?id=1238917
* https://bugzilla.suse.com/show_bug.cgi?id=1255075
* https://bugzilla.suse.com/show_bug.cgi?id=1256645
* https://bugzilla.suse.com/show_bug.cgi?id=1257231
* https://bugzilla.suse.com/show_bug.cgi?id=1257473
* https://bugzilla.suse.com/show_bug.cgi?id=1257732
* https://bugzilla.suse.com/show_bug.cgi?id=1257735
* https://bugzilla.suse.com/show_bug.cgi?id=1257749
* https://bugzilla.suse.com/show_bug.cgi?id=1257790
* https://bugzilla.suse.com/show_bug.cgi?id=1258340
* https://bugzilla.suse.com/show_bug.cgi?id=1258395
* https://bugzilla.suse.com/show_bug.cgi?id=1258518
* https://bugzilla.suse.com/show_bug.cgi?id=1258849
* https://bugzilla.suse.com/show_bug.cgi?id=1258850
* https://bugzilla.suse.com/show_bug.cgi?id=1259857
* https://jira.suse.com/browse/PED-12836
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