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SUSE Linux Micro 6.1 Kernel Important Security Fixes 2026-21690-1

An update that solves three vulnerabilities can now be installed.. # Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:21690-1 Release Date: 2026-05-15T16:43:03Z Rating: important References: * bsc#1264013 * bsc#1264450 * bsc#1265209 Cross-References: * CVE-2025-54518 * CVE-2026-43500 * CVE-2026-46300 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-2026-43500 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H * CVE-2026-43500 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2026-43500 ( 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 Affected Products: * SUSE Linux Micro 6.1 An update that solves three vulnerabilities can now be installed. ## Description: The SUSE Linux Enterprise Micro 6.0 and Micro 6.1 RT kernel was updated to fix various security issues The following security issues were fixed: * CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (bsc#1264013). * CVE-2026-46300: net: skbuff: propagate shared-frag marker through pskb_copy() (bsc#1265209). * CVE-2026-43500: rxrpc: unshare DATA/RESPONSE packets when paged frags are present (bsc#1264450). The following non security issues were fixed: * config: s390x/ppc64le: disable unsupported CONFIG_AFS_FS and CONFIG_AF_RXRPC (bsc#1264450). * io-wq: check that the predecessor is hashed in io_wq_remove_pending() (git- fixes). ## SpecialInstructions 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 Micro 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-kernel-427=1 ## Package List: * SUSE Linux Micro 6.1 (noarch) * kernel-source-rt-6.4.0-45.1 * kernel-devel-rt-6.4.0-45.1 * SUSE Linux Micro 6.1 (aarch64 nosrc x86_64) * kernel-rt-6.4.0-45.1 * SUSE Linux Micro 6.1 (aarch64 x86_64) * kernel-rt-debuginfo-6.4.0-45.1 * kernel-rt-debugsource-6.4.0-45.1 * kernel-rt-devel-6.4.0-45.1 * SUSE Linux Micro 6.1 (x86_64) * kernel-rt-livepatch-6.4.0-45.1 * kernel-rt-devel-debuginfo-6.4.0-45.1 ## References: * https://www.suse.com/security/cve/CVE-2025-54518.html * https://www.suse.com/security/cve/CVE-2026-43500.html * https://www.suse.com/security/cve/CVE-2026-46300.html * https://bugzilla.suse.com/show_bug.cgi?id=1264013 * https://bugzilla.suse.com/show_bug.cgi?id=1264450 * https://bugzilla.suse.com/show_bug.cgi?id=1265209 . SUSE update addresses three important issues in kernel ensure secure data handling and system integrity for users.. SUSE Linux Micro security update kernel vulnerabilities patch important. . Severity: Important. LinuxSecurity.com Team

May 21, 2026 •Important SuSE