{"schema":"threatline.record/2","record":{"id":"CVE-2026-98261","aliases":[],"summary":"cifs: Fix server use-after-free in cifs_chan_skip_or_disable()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix server use-after-free in cifs_chan_skip_or_disable()\n\nWhen a secondary channel is no longer supported by the server,\ncifs_chan_skip_or_disable() drops the channel reference with\ncifs_put_tcp_session() and then continues to use the server pointer by\ncalling cifs_signal_cifsd_for_reconnect() on it and reading its\nprimary_server pointer. cifs_put_tcp_session() can drop the last\nreference of the channel and tear it down, so both the channel and the\nprimary server (whose reference is also dropped by\ncifs_put_tcp_session()) can be freed before they are signaled for\nreconnect.\n\nSignal the channel and the primary server and capture the primary\nserver pointer before dropping the channel reference with\ncifs_put_tcp_session().","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"50e8363ecc85da49764781da90ebffe1a657b370","lessThan":"0338489960ddad6368bce55e8adbc176c523093d","status":"affected","versionType":"git"},{"version":"f591062bdbf4742b7f1622173017f19e927057b0","lessThan":"edd52eae5fcfb8433b6bb0e7cd98db438fe01227","status":"affected","versionType":"git"},{"version":"f591062bdbf4742b7f1622173017f19e927057b0","lessThan":"fcc0a935bb6e37ecbf7e4335061309f896f35780","status":"affected","versionType":"git"},{"version":"f591062bdbf4742b7f1622173017f19e927057b0","lessThan":"7a1b27780b113583a94256d58dabfe7c0d9286e7","status":"affected","versionType":"git"},{"version":"f591062bdbf4742b7f1622173017f19e927057b0","lessThan":"717e0a25036b6c92cecace30913b2d874a4c22b8","status":"affected","versionType":"git"},{"version":"d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4","status":"affected","versionType":"git"},{"version":"6.6.15","lessThan":"6.6.158","status":"affected","versionType":"semver"},{"version":"6.7.3","lessThan":"6.8","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","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-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0338489960ddad6368bce55e8adbc176c523093d","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7a1b27780b113583a94256d58dabfe7c0d9286e7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"717e0a25036b6c92cecace30913b2d874a4c22b8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.6.158","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","source_modified_at":"2026-10-19T09:16:32.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.8","basis":"first unaffected version stated in the CVE record"}],"cvss":8.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00441,"percentile":0.37258,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:45:25.361Z","modified_at":"2026-10-19T09:16:32.334Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98261","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:16:32.334Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98261","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/0338489960ddad6368bce55e8adbc176c523093d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/edd52eae5fcfb8433b6bb0e7cd98db438fe01227"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/fcc0a935bb6e37ecbf7e4335061309f896f35780"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7a1b27780b113583a94256d58dabfe7c0d9286e7"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/717e0a25036b6c92cecace30913b2d874a4c22b8"}],"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":"2026-10-19T09:16:32.334Z","content_hash":"c5bbb86fc3fbfee1814a803e76c31264df3709abaa77900babccca5e20a702f8"}}