{"id":"SUSE-SU-2026:1563-1","summary":"Security update for the Linux Kernel","details":"\nThe SUSE Linux Enterprise 15 SP4 kernel was updated to fix various security issues\n\nThe following security issues were fixed:\n\n- CVE-2025-38234: sched/rt: Fix race in push_rt_task (bsc#1246057).\n- CVE-2026-23103: ipvlan: Make the addrs_lock be per port (bsc#1257773).\n- CVE-2026-23243: RDMA/umad: Reject negative data_len in ib_umad_write (bsc#1259797).\n- CVE-2026-23272: netfilter: nf_tables: unconditionally bump set-nelems before insertion (bsc#1260009).\n- CVE-2026-23274: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels (bsc#1260005).\n\nThe following non security issue was fixed:\n\n- watchdog/perf: properly initialize the turbo mode timestamp and rearm counter (bsc#1256504).\n","modified":"2026-04-24T08:15:16.809280Z","published":"2026-04-23T07:08:02Z","related":["CVE-2025-38234","CVE-2025-68818","CVE-2026-23103","CVE-2026-23243","CVE-2026-23272","CVE-2026-23274"],"upstream":["CVE-2025-38234","CVE-2025-68818","CVE-2026-23103","CVE-2026-23243","CVE-2026-23272","CVE-2026-23274"],"references":[{"type":"ADVISORY","url":"https://www.suse.com/support/update/announcement/2026/suse-su-20261563-1/"},{"type":"REPORT","url":"https://bugzilla.suse.com/1246057"},{"type":"REPORT","url":"https://bugzilla.suse.com/1256504"},{"type":"REPORT","url":"https://bugzilla.suse.com/1256675"},{"type":"REPORT","url":"https://bugzilla.suse.com/1257773"},{"type":"REPORT","url":"https://bugzilla.suse.com/1259797"},{"type":"REPORT","url":"https://bugzilla.suse.com/1260005"},{"type":"REPORT","url":"https://bugzilla.suse.com/1260009"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2025-38234"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2025-68818"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-23103"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-23243"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-23272"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2026-23274"}],"affected":[{"package":{"name":"kernel-default","ecosystem":"SUSE:Linux 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