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SUSE Linux Micro 6.0 Kernel Important Local Root Exploit Vuln 2026-21894-1

An update that solves five vulnerabilities can now be installed.. # Security update for the Linux Kernel (Live Patch 17 for SUSE Linux Enterprise Micro 6.0) Announcement ID: SUSE-SU-2026:21894-1 Release Date: 2026-06-01T09:26:24Z Rating: important References: * bsc#1259798 * bsc#1260908 * bsc#1264096 * bsc#1265224 * bsc#1265384 Cross-References: * CVE-2025-54518 * CVE-2026-23243 * CVE-2026-23274 * CVE-2026-46300 * CVE-2026-46333 CVSS scores: * CVE-2025-54518 ( 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-2025-54518 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H * CVE-2025-54518 ( NVD ): 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X * 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-2026-23274 ( 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-2026-46300 ( SUSE ): 8.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N * CVE-2026-46300 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H * CVE-2026-46300 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2026-46300 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2026-46333 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2026-46333 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N * CVE-2026-46333 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Affected Products: * SUSE Linux Micro 6.1 An update that solvesfive vulnerabilities can now be installed. ## Description: This update for the SUSE Linux Enterprise Kernel 6.4.0-40.1 fixes various security issues The following security issues were fixed: * CVE-2025-54518: AMD-SN-7052: CPU OP Cache Corruption (bsc#1264096). * CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write (bsc#1259798). * CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels (bsc#1260908). * CVE-2026-46300: FragNesia attack: another xfrm/esp based local root exploit (bsc#1265224). * CVE-2026-46333: ptrace: slightly saner 'get_dumpable()' logic (bsc#1265384). ## 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 Micro 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-kernel-460=1 ## Package List: * SUSE Linux Micro 6.1 (s390x x86_64) * kernel-livepatch-MICRO-6-0_Update_17-debugsource-5-1.1 * kernel-livepatch-6_4_0-40-default-debuginfo-5-1.1 * kernel-livepatch-6_4_0-40-default-5-1.1 ## References: * https://www.suse.com/security/cve/CVE-2025-54518.html * https://www.suse.com/security/cve/CVE-2026-23243.html * https://www.suse.com/security/cve/CVE-2026-23274.html * https://www.suse.com/security/cve/CVE-2026-46300.html * https://www.suse.com/security/cve/CVE-2026-46333.html * https://bugzilla.suse.com/show_bug.cgi?id=1259798 * https://bugzilla.suse.com/show_bug.cgi?id=1260908 * https://bugzilla.suse.com/show_bug.cgi?id=1264096 * https://bugzilla.suse.com/show_bug.cgi?id=1265224 * https://bugzilla.suse.com/show_bug.cgi?id=1265384 . This update for SUSE Linux addresses important kernel security issues affecting multiple vulnerabilities.. Linux Kernel Update, SUSE Security Patch, Important Kernel Vulnerabilities. . Severity: Important. LinuxSecurity.com Team

Jun 02, 2026 •Important SuSE