{"id":"CVE-2026-98559","title":"net/smc: fix UAF on lgr list traversal in smcr_port_err()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix UAF on lgr list traversal in smcr_port_err()\n\nsmcr_port_err() traverses smc_lgr_list.list without holding\nsmc_lgr_list.lock, allowing a concurrent smc_lgr_…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 34bcf11cd2528ae00bb6d764d808083c66824277","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 0edcc4284392b28826b5d37532b366b291e6e0fa","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 00a59600ae72d24859d0ad1783a78bc921bc2599","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 3d35f069e1c119992000d51236dbe54da2d4e61e","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 3d65a2eb4449fc9658fb860dea893025d028d90e","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < a9b968e42690d784c241a0761c10253271f7df5d","Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 61cb282fe97b3b0ba32ca09417a693162bf4ae3f","Linux 5.8"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:18:26.349Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98559","references":[{"url":"https://git.kernel.org/stable/c/34bcf11cd2528ae00bb6d764d808083c66824277"},{"url":"https://git.kernel.org/stable/c/0edcc4284392b28826b5d37532b366b291e6e0fa"},{"url":"https://git.kernel.org/stable/c/00a59600ae72d24859d0ad1783a78bc921bc2599"},{"url":"https://git.kernel.org/stable/c/3d35f069e1c119992000d51236dbe54da2d4e61e"},{"url":"https://git.kernel.org/stable/c/3d65a2eb4449fc9658fb860dea893025d028d90e"},{"url":"https://git.kernel.org/stable/c/a9b968e42690d784c241a0761c10253271f7df5d"},{"url":"https://git.kernel.org/stable/c/61cb282fe97b3b0ba32ca09417a693162bf4ae3f"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.262Z","slug":"CVE-2026-98559","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix UAF on lgr list traversal in smcr_port_err()\n\nsmcr_port_err() traverses smc_lgr_list.list without holding\nsmc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched()\nto free an lgr while it is still being dereferenced.\n\nHold smc_lgr_list.lock across the traversal. Update\nsmc_ib_gid_check() to call smcr_port_err() after releasing the lock.\n\n## Affected\n\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 34bcf11cd2528ae00bb6d764d808083c66824277`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 0edcc4284392b28826b5d37532b366b291e6e0fa`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 00a59600ae72d24859d0ad1783a78bc921bc2599`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 3d35f069e1c119992000d51236dbe54da2d4e61e`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 3d65a2eb4449fc9658fb860dea893025d028d90e`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < a9b968e42690d784c241a0761c10253271f7df5d`\n- `Linux >= 541afa10c126b6c22c2a805a559c70cc41fd156e < 61cb282fe97b3b0ba32ca09417a693162bf4ae3f`\n- `Linux 5.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}