{"schema":"threatline.record/2","record":{"id":"CVE-2026-97562","aliases":[],"summary":"smb: client: pin DFS superblock in iterator callback","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: pin DFS superblock in iterator callback\n\ntcon_super_cb() stores a raw superblock pointer, but __cifs_get_super()\ntakes its active reference only after iterate_supers_type() has dropped\ns_umount and its passive reference. Concurrent DFS automount expiry can\ntherefore free the superblock before cifs_sb_active() uses it.\n\nA deterministic KASAN test reproduces the race as:\n\n  BUG: KASAN: slab-use-after-free in cifs_sb_active+0x77/0x80\n\nThe same test passes with this change applied.\n\nTake the active reference in the callback while iterate_supers_type()\nstill holds s_umount shared. cifs_put_tcp_super() remains the matching\nrelease.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97562","source_modified_at":"2026-10-19T09:09:25.220Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"bacd704a95ad0b93af995aae4a523aa046f46563","lessThan":"3c9acc9835c304013a4faeb969fe9333d66ca9f8","status":"affected","versionType":"git"},{"version":"bacd704a95ad0b93af995aae4a523aa046f46563","lessThan":"ea43a15cea36dc5ddd832be5bddeac7dd804cbcf","status":"affected","versionType":"git"},{"version":"bacd704a95ad0b93af995aae4a523aa046f46563","lessThan":"a6b6561522212af852c9ad8a7dca8d59ef2c7377","status":"affected","versionType":"git"},{"version":"bacd704a95ad0b93af995aae4a523aa046f46563","lessThan":"5b01a8c0209690db75341528ec53fd87e0ac1460","status":"affected","versionType":"git"},{"version":"bacd704a95ad0b93af995aae4a523aa046f46563","lessThan":"d806d5a85dcbe2a0f181b2f0f9f61ddfbefa1818","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97562","source_modified_at":"2026-10-19T09:09:25.220Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97562","source_modified_at":"2026-10-19T09:09:25.220Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"3c9acc9835c304013a4faeb969fe9333d66ca9f8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97562","source_modified_at":"2026-10-19T09:09:25.220Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5b01a8c0209690db75341528ec53fd87e0ac1460","basis":"first unaffected version stated in the CVE record"}],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00408,"percentile":0.33956,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:21:50.664Z","modified_at":"2026-10-19T09:09:25.220Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97562","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:09:25.220Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97562","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/3c9acc9835c304013a4faeb969fe9333d66ca9f8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ea43a15cea36dc5ddd832be5bddeac7dd804cbcf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a6b6561522212af852c9ad8a7dca8d59ef2c7377"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5b01a8c0209690db75341528ec53fd87e0ac1460"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d806d5a85dcbe2a0f181b2f0f9f61ddfbefa1818"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:09:25.220Z","content_hash":"f81feb34865c57991ff0a065cb7a2783da99746c93976eba66a8da5655fb50e0"}}