{"id":"CVE-2026-98559","state":"PUBLISHED","title":"net/smc: fix UAF on lgr list traversal in smcr_port_err()","description":"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_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.","publishedAt":"2026-10-18T15:18:26.349Z","updatedAt":"2026-10-19T09:21:43.436Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"34bcf11cd2528ae00bb6d764d808083c66824277","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"0edcc4284392b28826b5d37532b366b291e6e0fa","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"00a59600ae72d24859d0ad1783a78bc921bc2599","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"3d35f069e1c119992000d51236dbe54da2d4e61e","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"3d65a2eb4449fc9658fb860dea893025d028d90e","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"a9b968e42690d784c241a0761c10253271f7df5d","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"61cb282fe97b3b0ba32ca09417a693162bf4ae3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/smc/smc_core.c","net/smc/smc_ib.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/smc/smc_core.c","net/smc/smc_ib.c"]}],"references":["https://git.kernel.org/stable/c/34bcf11cd2528ae00bb6d764d808083c66824277","https://git.kernel.org/stable/c/0edcc4284392b28826b5d37532b366b291e6e0fa","https://git.kernel.org/stable/c/00a59600ae72d24859d0ad1783a78bc921bc2599","https://git.kernel.org/stable/c/3d35f069e1c119992000d51236dbe54da2d4e61e","https://git.kernel.org/stable/c/3d65a2eb4449fc9658fb860dea893025d028d90e","https://git.kernel.org/stable/c/a9b968e42690d784c241a0761c10253271f7df5d","https://git.kernel.org/stable/c/61cb282fe97b3b0ba32ca09417a693162bf4ae3f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98559.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98559","state":"PUBLISHED","datePublished":"2026-10-18T15:18:26.349Z","dateUpdated":"2026-10-19T09:21:43.436Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.357Z"},"containers":{"cna":{"title":"net/smc: fix UAF on lgr list traversal in smcr_port_err()","descriptions":[{"lang":"en","value":"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_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"34bcf11cd2528ae00bb6d764d808083c66824277","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"0edcc4284392b28826b5d37532b366b291e6e0fa","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"00a59600ae72d24859d0ad1783a78bc921bc2599","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"3d35f069e1c119992000d51236dbe54da2d4e61e","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"3d65a2eb4449fc9658fb860dea893025d028d90e","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"a9b968e42690d784c241a0761c10253271f7df5d","versionType":"git"},{"version":"541afa10c126b6c22c2a805a559c70cc41fd156e","status":"affected","lessThan":"61cb282fe97b3b0ba32ca09417a693162bf4ae3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/smc/smc_core.c","net/smc/smc_ib.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/smc/smc_core.c","net/smc/smc_ib.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:21:43.436Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}