ESB-2026.3777 — Vulnetix

ESB-2026.3777 PUBLISHED CVSS 7.800000190734863 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3777 Security update for the Linux Kernel 16 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-23103 CVE-2026-23243 CVE-2026-23272 CVE-2026-23274 CVE-2025-38234 CVE-2026-23293 CVE-2026-23398 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261342-1 Comment: CVSS (Max): 7.8 CVE-2026-23243 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H EPSS (Max): 0.0% (9th) CVE-2026-23398 2026-04-15 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:1342-1 Release Date: 2026-04-15T10:15:56Z Rating: important o bsc#1246057 o bsc#1257773 o bsc#1259797 References: o bsc#1260005 o bsc#1260009 o bsc#1260486 o bsc#1260730 o CVE-2025-38234 o CVE-2026-23103 o CVE-2026-23243 Cross-References: o CVE-2026-23272 o CVE-2026-23274 o CVE-2026-23293 o CVE-2026-23398 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 CVSS scores: o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o 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 o openSUSE Leap 15.3 Products: o SUSE Linux Enterprise Micro 5.2 o 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: o CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057). o CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773). o CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write (bsc# 1259797). o CVE-2026-23272: netfilter: nf_tables: unconditionally bump set->nelems before insertion (bsc#1260009). o CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels (bsc#1260005). o CVE-2026-23293: net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled (bsc#1260486). o CVE-2026-23398: icmp: fix NULL pointer dereference in icmp_tag_validation() (bsc#1260730). Special Instructions and Notes: o 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: o openSUSE Leap 15.3 zypper in -t patch SUSE-2026-1342=1 o SUSE Linux Enterprise Micro 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1342=1 o SUSE Linux Enterprise Micro for Rancher 5.2 zypper in -t patch SUSE-SUSE-MicroOS-5.2-2026-1342=1 Package List: o openSUSE Leap 15.3 (noarch nosrc) kernel-docs-5.3.18-150300.59.241.1 o 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 o 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 o openSUSE Leap 15.3 (aarch64 ppc64le s390x x86_64 nosrc) kernel-default-5.3.18-150300.59.241.1 o openSUSE Leap 15.3 (ppc64le s390x x86_64) kernel-default-livepatch-devel-5.3.18-150300.59.241.1 o openSUSE Leap 15.3 (nosrc ppc64le x86_64) kernel-kvmsmall-5.3.18-150300.59.241.1 o 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 o 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 o openSUSE Leap 15.3 (aarch64 nosrc x86_64) kernel-preempt-5.3.18-150300.59.241.1 o openSUSE Leap 15.3 (nosrc s390x) kernel-zfcpdump-5.3.18-150300.59.241.1 o 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 o openSUSE Leap 15.3 (nosrc) dtb-aarch64-5.3.18-150300.59.241.1 o 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 o openSUSE Leap 15.3 (aarch64 nosrc) kernel-64kb-5.3.18-150300.59.241.1 o SUSE Linux Enterprise Micro 5.2 (aarch64 nosrc s390x x86_64) kernel-default-5.3.18-150300.59.241.1 o SUSE Linux Enterprise Micro 5.2 (aarch64 x86_64) kernel-default-base-5.3.18-150300.59.241.1.150300.18.144.1 o 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 o 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 o SUSE Linux Enterprise Micro for Rancher 5.2 (aarch64 nosrc s390x x86_64) kernel-default-5.3.18-150300.59.241.1 o 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 o 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 o 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: o https://www.suse.com/security/cve/CVE-2025-38234.html o https://www.suse.com/security/cve/CVE-2026-23103.html o https://www.suse.com/security/cve/CVE-2026-23243.html o https://www.suse.com/security/cve/CVE-2026-23272.html o https://www.suse.com/security/cve/CVE-2026-23274.html o https://www.suse.com/security/cve/CVE-2026-23293.html o https://www.suse.com/security/cve/CVE-2026-23398.html o https://bugzilla.suse.com/show_bug.cgi?id=1246057 o https://bugzilla.suse.com/show_bug.cgi?id=1257773 o https://bugzilla.suse.com/show_bug.cgi?id=1259797 o https://bugzilla.suse.com/show_bug.cgi?id=1260005 o https://bugzilla.suse.com/show_bug.cgi?id=1260009 o https://bugzilla.suse.com/show_bug.cgi?id=1260486 o https://bugzilla.suse.com/show_bug.cgi?id=1260730 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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Risk Scores

CVSS v3.1

7.800000190734863

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions
SUSE	Linux Kernel

Timeline

Apr 16, 2026 CVE Published

References

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