{"schema":"threatline.record/2","record":{"id":"CVE-2026-98405","aliases":[],"summary":"smb: client: fix missing iov bounds check in parse_posix_sids()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix missing iov bounds check in parse_posix_sids()\n\nIn parse_posix_sids(), sidsbuf_end is calculated using the server-supplied\nout_len without being validated against the actual length of the received\niov (iov_len).\n\nIf a server provides an inflated out_len, sidsbuf_end will point past the\nend of the iov. This defeats the bounds guards in posix_info_sid_size(),\nallowing out-of-bounds reads into adjacent kernel memory.\n\nFix this by rejecting responses where the calculated sidsbuf_end would\nexceed the received iov boundaries or cause pointer wraparound.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98405","source_modified_at":"2026-10-19T13:42:20.296Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"a90f37e3d7acfd9824f162830583bbf7846fe252","lessThan":"d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644","status":"affected","versionType":"git"},{"version":"858e74876c5cbff1dfd5bace99e32fbce2abd4b5","lessThan":"b862996e5105be1293da9cdc85da77b76021c3bd","status":"affected","versionType":"git"},{"version":"858e74876c5cbff1dfd5bace99e32fbce2abd4b5","lessThan":"2f8ed71aaaba3bc8b19cd9930cc62e63e142b299","status":"affected","versionType":"git"},{"version":"858e74876c5cbff1dfd5bace99e32fbce2abd4b5","lessThan":"eac6917a42899aad0617bbf04798c5dd946a1fe5","status":"affected","versionType":"git"},{"version":"858e74876c5cbff1dfd5bace99e32fbce2abd4b5","lessThan":"b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc","status":"affected","versionType":"git"},{"version":"6.6.32","lessThan":"6.6.158","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98405","source_modified_at":"2026-10-19T13:42:20.296Z","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-2026-98405","source_modified_at":"2026-10-19T13:42:20.296Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2f8ed71aaaba3bc8b19cd9930cc62e63e142b299","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98405","source_modified_at":"2026-10-19T13:42:20.296Z","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"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00209,"percentile":0.10506,"score_date":"2026-10-23"},"published_at":"2026-10-14T13:27:40.589Z","modified_at":"2026-10-19T13:42:20.296Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98405","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T13:42:20.296Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98405","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/d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b862996e5105be1293da9cdc85da77b76021c3bd"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2f8ed71aaaba3bc8b19cd9930cc62e63e142b299"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/eac6917a42899aad0617bbf04798c5dd946a1fe5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T13:42:20.296Z","content_hash":"1723afa31fb80080703c86a4d82b1cbaedca03a96002167556a54bbefe38c91e"}}