Security update for the Linux Kernel

Announcement ID:	SUSE-SU-2026:1342-1
Release Date:	2026-04-15T10:15:56Z
Rating:	important
References:	bsc#1246057 bsc#1257773 bsc#1259797 bsc#1260005 bsc#1260009 bsc#1260486 bsc#1260730
Cross-References:	CVE-2025-38234 CVE-2026-23103 CVE-2026-23243 CVE-2026-23272 CVE-2026-23274 CVE-2026-23293 CVE-2026-23398
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-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 CVE-2026-23293 ( SUSE ): 5.9 CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-23293 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-23398 ( SUSE ): 5.9 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-23398 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:	openSUSE Leap 15.3 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro for Rancher 5.2

An update that solves seven vulnerabilities can now be installed.

Description:

The SUSE Linux Enterprise 15 SP3 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).
• CVE-2026-23293: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled (bsc#1260486).
• CVE-2026-23398: icmp: fix NULL pointer dereference in icmp_tag_validation() (bsc#1260730).

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 15.3
  zypper in -t patch SUSE-2026-1342=1
• SUSE Linux Enterprise Micro 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1342=1
• SUSE Linux Enterprise Micro for Rancher 5.2
  zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1342=1

Package List:

• openSUSE Leap 15.3 (noarch nosrc)
  • kernel-docs-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (noarch)
  • kernel-devel-5.3.18-150300.59.241.1
  • kernel-source-5.3.18-150300.59.241.1
  • kernel-source-vanilla-5.3.18-150300.59.241.1
  • kernel-docs-html-5.3.18-150300.59.241.1
  • kernel-macros-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64)
  • kernel-default-debugsource-5.3.18-150300.59.241.1
  • kernel-obs-build-debugsource-5.3.18-150300.59.241.1
  • gfs2-kmp-default-debuginfo-5.3.18-150300.59.241.1
  • kernel-default-optional-5.3.18-150300.59.241.1
  • cluster-md-kmp-default-5.3.18-150300.59.241.1
  • reiserfs-kmp-default-debuginfo-5.3.18-150300.59.241.1
  • kselftests-kmp-default-5.3.18-150300.59.241.1
  • reiserfs-kmp-default-5.3.18-150300.59.241.1
  • cluster-md-kmp-default-debuginfo-5.3.18-150300.59.241.1
  • kernel-default-devel-5.3.18-150300.59.241.1
  • ocfs2-kmp-default-5.3.18-150300.59.241.1
  • kernel-default-extra-5.3.18-150300.59.241.1
  • kernel-default-debuginfo-5.3.18-150300.59.241.1
  • kernel-default-livepatch-5.3.18-150300.59.241.1
  • dlm-kmp-default-5.3.18-150300.59.241.1
  • kernel-default-base-rebuild-5.3.18-150300.59.241.1.150300.18.144.1
  • kernel-obs-build-5.3.18-150300.59.241.1
  • ocfs2-kmp-default-debuginfo-5.3.18-150300.59.241.1
  • kernel-default-devel-debuginfo-5.3.18-150300.59.241.1
  • kernel-syms-5.3.18-150300.59.241.1
  • gfs2-kmp-default-5.3.18-150300.59.241.1
  • kernel-default-extra-debuginfo-5.3.18-150300.59.241.1
  • dlm-kmp-default-debuginfo-5.3.18-150300.59.241.1
  • kernel-default-base-5.3.18-150300.59.241.1.150300.18.144.1
  • kernel-default-optional-debuginfo-5.3.18-150300.59.241.1
  • kernel-obs-qa-5.3.18-150300.59.241.1
  • kselftests-kmp-default-debuginfo-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64 nosrc)
  • kernel-default-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (ppc64le s390x x86_64)
  • kernel-default-livepatch-devel-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (nosrc ppc64le x86_64)
  • kernel-kvmsmall-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (ppc64le x86_64)
  • kernel-kvmsmall-devel-debuginfo-5.3.18-150300.59.241.1
  • kernel-kvmsmall-debugsource-5.3.18-150300.59.241.1
  • kernel-kvmsmall-debuginfo-5.3.18-150300.59.241.1
  • kernel-kvmsmall-devel-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64 x86_64)
  • dlm-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • kselftests-kmp-preempt-5.3.18-150300.59.241.1
  • ocfs2-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • gfs2-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • kernel-preempt-extra-debuginfo-5.3.18-150300.59.241.1
  • reiserfs-kmp-preempt-5.3.18-150300.59.241.1
  • kernel-preempt-optional-debuginfo-5.3.18-150300.59.241.1
  • cluster-md-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • kernel-preempt-devel-debuginfo-5.3.18-150300.59.241.1
  • reiserfs-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • dlm-kmp-preempt-5.3.18-150300.59.241.1
  • kernel-preempt-optional-5.3.18-150300.59.241.1
  • kernel-preempt-debuginfo-5.3.18-150300.59.241.1
  • kselftests-kmp-preempt-debuginfo-5.3.18-150300.59.241.1
  • gfs2-kmp-preempt-5.3.18-150300.59.241.1
  • ocfs2-kmp-preempt-5.3.18-150300.59.241.1
  • kernel-preempt-devel-5.3.18-150300.59.241.1
  • kernel-preempt-extra-5.3.18-150300.59.241.1
  • kernel-preempt-debugsource-5.3.18-150300.59.241.1
  • cluster-md-kmp-preempt-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64 nosrc x86_64)
  • kernel-preempt-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (nosrc s390x)
  • kernel-zfcpdump-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (s390x)
  • kernel-zfcpdump-debugsource-5.3.18-150300.59.241.1
  • kernel-zfcpdump-debuginfo-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (nosrc)
  • dtb-aarch64-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64)
  • dtb-altera-5.3.18-150300.59.241.1
  • kernel-64kb-devel-debuginfo-5.3.18-150300.59.241.1
  • reiserfs-kmp-64kb-5.3.18-150300.59.241.1
  • dtb-arm-5.3.18-150300.59.241.1
  • dtb-renesas-5.3.18-150300.59.241.1
  • dtb-sprd-5.3.18-150300.59.241.1
  • dtb-rockchip-5.3.18-150300.59.241.1
  • dtb-exynos-5.3.18-150300.59.241.1
  • dtb-zte-5.3.18-150300.59.241.1
  • reiserfs-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • kernel-64kb-extra-5.3.18-150300.59.241.1
  • dtb-hisilicon-5.3.18-150300.59.241.1
  • dtb-nvidia-5.3.18-150300.59.241.1
  • kernel-64kb-debugsource-5.3.18-150300.59.241.1
  • dtb-amlogic-5.3.18-150300.59.241.1
  • dtb-mediatek-5.3.18-150300.59.241.1
  • dtb-amd-5.3.18-150300.59.241.1
  • kernel-64kb-optional-debuginfo-5.3.18-150300.59.241.1
  • dtb-qcom-5.3.18-150300.59.241.1
  • dtb-socionext-5.3.18-150300.59.241.1
  • dlm-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • cluster-md-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • dlm-kmp-64kb-5.3.18-150300.59.241.1
  • kernel-64kb-extra-debuginfo-5.3.18-150300.59.241.1
  • dtb-freescale-5.3.18-150300.59.241.1
  • kernel-64kb-devel-5.3.18-150300.59.241.1
  • gfs2-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • ocfs2-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • kernel-64kb-debuginfo-5.3.18-150300.59.241.1
  • dtb-cavium-5.3.18-150300.59.241.1
  • dtb-lg-5.3.18-150300.59.241.1
  • cluster-md-kmp-64kb-5.3.18-150300.59.241.1
  • kselftests-kmp-64kb-debuginfo-5.3.18-150300.59.241.1
  • dtb-al-5.3.18-150300.59.241.1
  • dtb-marvell-5.3.18-150300.59.241.1
  • ocfs2-kmp-64kb-5.3.18-150300.59.241.1
  • gfs2-kmp-64kb-5.3.18-150300.59.241.1
  • dtb-broadcom-5.3.18-150300.59.241.1
  • kselftests-kmp-64kb-5.3.18-150300.59.241.1
  • dtb-allwinner-5.3.18-150300.59.241.1
  • dtb-xilinx-5.3.18-150300.59.241.1
  • kernel-64kb-optional-5.3.18-150300.59.241.1
  • dtb-apm-5.3.18-150300.59.241.1
• openSUSE Leap 15.3 (aarch64 nosrc)
  • kernel-64kb-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro 5.2 (aarch64 nosrc s390x x86_64)
  • kernel-default-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro 5.2 (aarch64 x86_64)
  • kernel-default-base-5.3.18-150300.59.241.1.150300.18.144.1
• SUSE Linux Enterprise Micro 5.2 (aarch64 s390x x86_64)
  • kernel-default-debugsource-5.3.18-150300.59.241.1
  • kernel-default-debuginfo-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro 5.2 (noarch)
  • kernel-macros-5.3.18-150300.59.241.1
  • kernel-source-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 nosrc s390x x86_64)
  • kernel-default-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 x86_64)
  • kernel-default-base-5.3.18-150300.59.241.1.150300.18.144.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 s390x x86_64)
  • kernel-default-debugsource-5.3.18-150300.59.241.1
  • kernel-default-debuginfo-5.3.18-150300.59.241.1
• SUSE Linux Enterprise Micro for Rancher 5.2 (noarch)
  • kernel-macros-5.3.18-150300.59.241.1
  • kernel-source-5.3.18-150300.59.241.1

References:

• https://www.suse.com/security/cve/CVE-2025-38234.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://www.suse.com/security/cve/CVE-2026-23293.html
• https://www.suse.com/security/cve/CVE-2026-23398.html
• https://bugzilla.suse.com/show_bug.cgi?id=1246057
• 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
• https://bugzilla.suse.com/show_bug.cgi?id=1260486
• https://bugzilla.suse.com/show_bug.cgi?id=1260730