ESB-2026.4127

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4127 Security update for the Linux Kernel 24 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2025-68818 CVE-2026-23103 CVE-2026-23243 CVE-2026-23272 CVE-2026-23274 CVE-2025-38234 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261557-1 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): 0.1% (16th) CVE-2025-68818 2026-04-22 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:1557-1 Release Date: 2026-04-22T16:24:13Z Rating: important o bsc#1246057 o bsc#1256504 o bsc#1256675 References: o bsc#1257773 o bsc#1259797 o bsc#1260005 o bsc#1260009 o CVE-2025-38234 o CVE-2025-68818 o CVE-2026-23103 Cross-References: o CVE-2026-23243 o CVE-2026-23272 o CVE-2026-23274 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-2025-68818 ( 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 ( 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 CVSS scores: /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 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 SUSE Linux Enterprise Micro 5.3 Affected o SUSE Linux Enterprise Micro 5.4 Products: o SUSE Linux Enterprise Micro for Rancher 5.3 o 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: o CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057). o CVE-2025-68818: scsi: Revert "scsi: qla2xxx: Perform lockless command completion in abort path" (bsc#1256675). 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). The following non-security bugs were fixed: o watchdog/perf: properly initialize the turbo mode timestamp and rearm counter (bsc#1256504). 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 SUSE Linux Enterprise Micro for Rancher 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-1557=1 o SUSE Linux Enterprise Micro 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-1557=1 o SUSE Linux Enterprise Micro for Rancher 5.4 zypper in -t patch SUSE-SLE-Micro-5.4-2026-1557=1 o SUSE Linux Enterprise Micro 5.4 zypper in -t patch SUSE-SLE-Micro-5.4-2026-1557=1 Package List: o SUSE Linux Enterprise Micro for Rancher 5.3 (nosrc x86_64) kernel-rt-5.14.21-150400.15.148.1 o 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 o SUSE Linux Enterprise Micro for Rancher 5.3 (noarch) kernel-source-rt-5.14.21-150400.15.148.1 o SUSE Linux Enterprise Micro 5.3 (nosrc x86_64) kernel-rt-5.14.21-150400.15.148.1 o 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 o SUSE Linux Enterprise Micro 5.3 (noarch) kernel-source-rt-5.14.21-150400.15.148.1 o SUSE Linux Enterprise Micro for Rancher 5.4 (nosrc x86_64) kernel-rt-5.14.21-150400.15.148.1 o 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 o SUSE Linux Enterprise Micro for Rancher 5.4 (noarch) kernel-source-rt-5.14.21-150400.15.148.1 o SUSE Linux Enterprise Micro 5.4 (nosrc x86_64) kernel-rt-5.14.21-150400.15.148.1 o 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 o SUSE Linux Enterprise Micro 5.4 (noarch) kernel-source-rt-5.14.21-150400.15.148.1 References: o https://www.suse.com/security/cve/CVE-2025-38234.html o https://www.suse.com/security/cve/CVE-2025-68818.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://bugzilla.suse.com/show_bug.cgi?id=1246057 o https://bugzilla.suse.com/show_bug.cgi?id=1256504 o https://bugzilla.suse.com/show_bug.cgi?id=1256675 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 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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