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Fedora 39 System Core Safety Enhancements FEDORA-SU-2029-4412-4

opensuse
Calendar Grey April 23, 2026
Dist Opensuse Esm H88
SUSE Linux kernel update addresses multiple important security issues. Install for improved stability and security.
An update that solves six vulnerabilities and has one security fix can now be installed.

Description

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

issues

The following security issues were fixed:

* CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057).

* CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773).

* CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write

(bsc#1259797).

* CVE-2026-23272: netfilter: nf_tables: unconditionally bump set-nelems before

insertion (bsc#1260009).

* CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer

labels (bsc#1260005).

The following non security issue was fixed:

* watchdog/perf: properly initialize the turbo mode timestamp and rearm

counter (bsc#1256504).

## Special Instructions and Notes:

* Please reboot the system after installing this update.

Topics%20covered

Topics Covered

security advisory security issue important system fix Linux kernel OpenSUSE

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:

* openSUSE Leap 15.4

zypper in -t patch SUSE-2026-1563=1

* SUSE Linux Enterprise Micro for Rancher 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-1563=1

* SUSE Linux Enterprise Micro 5.3

zypper in -t patch SUSE-SLE-Micro-5.3-2026-1563=1

* SUSE Linux Enterprise Micro for Rancher 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-1563=1

* SUSE Linux Enterprise Micro 5.4

zypper in -t patch SUSE-SLE-Micro-5.4-2026-1563=1

* SUSE Linux Enterprise High Availability Extension 15 SP4

zypper in -t patch SUSE-SLE-Product-HA-15-SP4-2026-1563=1

* SUSE Linux Enterprise High Performance Computing ESPOS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-1563=1

* SUSE Linux Enterprise High Performance Computing LTSS 15 SP4

zypper in -t patch SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-1563=1

* SUSE Linux Enterprise...

Read the Full Advisory

Package List

* openSUSE Leap 15.4 (noarch nosrc)

* kernel-docs-5.14.21-150400.24.200.1

* openSUSE Leap 15.4 (noarch)

* kernel-docs-html-5.14.21-150400.24.200.1

* kernel-macros-5.14.21-150400.24.200.1

* kernel-devel-5.14.21-150400.24.200.1

* kernel-source-vanilla-5.14.21-150400.24.200.1

* kernel-source-5.14.21-150400.24.200.1

* openSUSE Leap 15.4 (aarch64 ppc64le x86_64)

* kernel-kvmsmall-devel-5.14.21-150400.24.200.1

* kernel-default-base-rebuild-5.14.21-150400.24.200.1.150400.24.102.1

* kernel-kvmsmall-devel-debuginfo-5.14.21-150400.24.200.1

* kernel-kvmsmall-debuginfo-5.14.21-150400.24.200.1

* kernel-default-base-5.14.21-150400.24.200.1.150400.24.102.1

* kernel-kvmsmall-debugsource-5.14.21-150400.24.200.1

* openSUSE Leap 15.4 (aarch64 ppc64le s390x x86_64)

* kernel-default-devel-debuginfo-5.14.21-150400.24.200.1

* ocfs2-kmp-default-5.14.21-150400.24.200.1

* kernel-syms-5.14.21-150400.24.200.1

* kernel-default-optional-debuginfo-5.14.21-150400.24.200.1

* kselftests-kmp-default-5.14.21-150400.24.200.1

*...

Read the Full Advisory

References

* bsc#1246057

* bsc#1256504

* bsc#1256675

* bsc#1257773

* bsc#1259797

* bsc#1260005

* bsc#1260009

## References:

* https://www.suse.com/security/cve/CVE-2025-38234.html

* https://www.suse.com/security/cve/CVE-2025-68818.html

* https://www.suse.com/security/cve/CVE-2026-23103.html

* https://www.suse.com/security/cve/CVE-2026-23243.html

* https://www.suse.com/security/cve/CVE-2026-23272.html

* https://www.suse.com/security/cve/CVE-2026-23274.html

* https://bugzilla.suse.com/show_bug.cgi?id=1246057

* https://bugzilla.suse.com/show_bug.cgi?id=1256504

* https://bugzilla.suse.com/show_bug.cgi?id=1256675

* https://bugzilla.suse.com/show_bug.cgi?id=1257773

* https://bugzilla.suse.com/show_bug.cgi?id=1259797

* https://bugzilla.suse.com/show_bug.cgi?id=1260005

* https://bugzilla.suse.com/show_bug.cgi?id=1260009

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:1563-1
Release Date: 2026-04-23T07:08:11Z
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 security issue important system fix Linux kernel OpenSUSE

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