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openSUSE Leap 15.4 kernel Noteworthy Security Updates 2026-0984-1

opensuse
Calendar Grey March 24, 2026
Dist Opensuse Esm H88
Critical kernel updates for openSUSE resolving multiple security issues and vulnerabilities require installation.
An update that solves 11 vulnerabilities and has two security fixes can now be installed.

Description

The SUSE Linux Enterprise 15 SP4 kernel was updated to receive various security

bugfixes.

The following security bugs 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-2026-23191: ALSA: aloop: Fix racy access at PCM trigger (bsc#1258395).

* CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful()

(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...

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Topics%20covered

Topics Covered

security advisory buffer overflow important kernel OpenSUSE local user access

Patch

## 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-SP4

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2026-984=1

* openSUSE Leap 15.4

zypper in -t patch SUSE-2026-984=1

* SUSE Linux Enterprise Micro for Rancher 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-984=1

* SUSE Linux Enterprise Micro 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-984=1

* SUSE Linux Enterprise Micro for Rancher 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-984=1

* SUSE Linux Enterprise Micro 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-984=1

* SUSE Linux Enterprise High Availability Extension 15 SP4

zypper in -t patch SUSE-SLE-Product-HA-15-SP4-2026-984=1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-984=1

* SUSE Linux Enterprise High Performance...

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Package List

* SUSE Linux Enterprise Live Patching 15-SP4 (nosrc)

* kernel-default-5.14.21-150400.24.197.1

* SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)

* kernel-default-debugsource-5.14.21-150400.24.197.1

* kernel-default-livepatch-5.14.21-150400.24.197.1

* kernel-default-debuginfo-5.14.21-150400.24.197.1

* kernel-livepatch-5_14_21-150400_24_197-default-debuginfo-1-150400.9.3.1

* kernel-livepatch-5_14_21-150400_24_197-default-1-150400.9.3.1

* kernel-livepatch-SLE15-SP4_Update_49-debugsource-1-150400.9.3.1

* kernel-default-livepatch-devel-5.14.21-150400.24.197.1

* openSUSE Leap 15.4 (noarch nosrc)

* kernel-docs-5.14.21-150400.24.197.1

* openSUSE Leap 15.4 (noarch)

* kernel-devel-5.14.21-150400.24.197.1

* kernel-docs-html-5.14.21-150400.24.197.1

* kernel-macros-5.14.21-150400.24.197.1

* kernel-source-vanilla-5.14.21-150400.24.197.1

* kernel-source-5.14.21-150400.24.197.1

* openSUSE Leap 15.4 (aarch64 ppc64le x86_64)

* kernel-default-base-rebuild-5.14.21-150400.24.197.1.150400.24.100.1

*...

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References

* bsc#1238917

* bsc#1255075

* bsc#1256645

* bsc#1257231

* bsc#1257473

* bsc#1257732

* bsc#1257735

* bsc#1258340

* bsc#1258395

* bsc#1258518

* bsc#1258849

* bsc#1258850

* bsc#1259857

## 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-2026-23191.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

*...

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Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0984-1
Release Date: 2026-03-23T22:20:54Z
Affected Products: * openSUSE Leap 15.4 * SUSE Linux Enterprise High Availability Extension 15 SP4 * SUSE Linux Enterprise High Performance Computing 15 SP4 * SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4 * SUSE Linux Enterprise High Performance Computing LTSS 15 SP4 * SUSE Linux Enterprise Live Patching 15-SP4 * SUSE Linux Enterprise Micro 5.3 * SUSE Linux Enterprise Micro 5.4 * SUSE Linux Enterprise Micro for Rancher 5.3 * SUSE Linux Enterprise Micro for Rancher 5.4 * SUSE Linux Enterprise Real Time 15 SP4 * SUSE Linux Enterprise Server 15 SP4 * SUSE Linux Enterprise Server 15 SP4 LTSS * SUSE Linux Enterprise Server for SAP Applications 15 SP4 * SUSE Manager Proxy 4.3 * SUSE Manager Retail Branch Server 4.3 * SUSE Manager Server 4.3

Topics%20covered

Topics Covered

security advisory buffer overflow important kernel OpenSUSE local user access

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