SUSE-SU-2026:1557-1: important: Security update for the Linux Kernel
SLE-SECURITY-UPDATES
null at suse.de
Thu Apr 23 08:30:47 UTC 2026
# Security update for the Linux Kernel
Announcement ID: SUSE-SU-2026:1557-1
Release Date: 2026-04-22T16:24:13Z
Rating: important
References:
* bsc#1246057
* bsc#1256504
* bsc#1256675
* bsc#1257773
* bsc#1259797
* bsc#1260005
* bsc#1260009
Cross-References:
* CVE-2025-38234
* CVE-2025-68818
* CVE-2026-23103
* CVE-2026-23243
* CVE-2026-23272
* CVE-2026-23274
CVSS scores:
* CVE-2025-38234 ( SUSE ): 5.7
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2025-38234 ( SUSE ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-38234 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-68818 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23103 ( 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-2026-23103 ( SUSE ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23103 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-23103 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23243 ( 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-2026-23243 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23243 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23272 ( 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-2026-23272 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23272 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23274 ( 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-2026-23274 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
* CVE-2026-23274 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
* 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
An update that solves six vulnerabilities and has one security fix can now be
installed.
## Description:
The SUSE Linux Enterprise 15 SP4 RT kernel was updated to receive various
security bugfixes.
The following security bugs were fixed:
* CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057).
* CVE-2025-68818: scsi: Revert "scsi: qla2xxx: Perform lockless command
completion in abort path" (bsc#1256675).
* 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 bugs were 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.
## 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 Micro for Rancher 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-1557=1
* SUSE Linux Enterprise Micro 5.3
zypper in -t patch SUSE-SLE-Micro-5.3-2026-1557=1
* SUSE Linux Enterprise Micro for Rancher 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-1557=1
* SUSE Linux Enterprise Micro 5.4
zypper in -t patch SUSE-SLE-Micro-5.4-2026-1557=1
## Package List:
* SUSE Linux Enterprise Micro for Rancher 5.3 (nosrc x86_64)
* kernel-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro for Rancher 5.3 (x86_64)
* kernel-rt-debugsource-5.14.21-150400.15.148.1
* kernel-rt-debuginfo-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro for Rancher 5.3 (noarch)
* kernel-source-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.3 (nosrc x86_64)
* kernel-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.3 (x86_64)
* kernel-rt-debugsource-5.14.21-150400.15.148.1
* kernel-rt-debuginfo-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.3 (noarch)
* kernel-source-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro for Rancher 5.4 (nosrc x86_64)
* kernel-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro for Rancher 5.4 (x86_64)
* kernel-rt-debugsource-5.14.21-150400.15.148.1
* kernel-rt-debuginfo-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro for Rancher 5.4 (noarch)
* kernel-source-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.4 (nosrc x86_64)
* kernel-rt-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.4 (x86_64)
* kernel-rt-debugsource-5.14.21-150400.15.148.1
* kernel-rt-debuginfo-5.14.21-150400.15.148.1
* SUSE Linux Enterprise Micro 5.4 (noarch)
* kernel-source-rt-5.14.21-150400.15.148.1
## 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
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