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SUSE-SU-2026:1563-1 Not scored

Security update for the Linux Kernel

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).

Exploit probability Not scored
Published April 23, 2026
Required by Not available
Last source change April 24, 2026

02 / AFFECTED SOFTWARE

Affected packages

SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-syms
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-docs
SUSE:Linux Enterprise Micro 5.3 kernel-default
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-default-base
SUSE:Linux Enterprise Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_50
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-syms
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-source
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-source
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-64kb
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-obs-build
SUSE:Linux Enterprise Micro 5.3 kernel-default-base
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-docs
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-default
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-default-base
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-default
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-64kb
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-default
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-obs-build
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-obs-build
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-obs-build
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-syms
SUSE:Linux Enterprise Micro 5.4 kernel-default
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 kernel-source
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-zfcpdump
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-docs
SUSE:Linux Enterprise Live Patching 15 SP4 kernel-default
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-syms
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-default-base
SUSE:Linux Enterprise Micro 5.4 kernel-default-base
SUSE:Linux Enterprise High Availability Extension 15 SP4 kernel-default
SUSE:Linux Enterprise Micro 5.3 kernel-source
SUSE:Linux Enterprise Server 15 SP4-LTSS kernel-docs
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-default
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-source
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-default-base
SUSE:Linux Enterprise Micro 5.4 kernel-source
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS kernel-64kb

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities SUSE-SU-2026:1563-1

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).

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05 / REFERENCES

Further evidence