{"schema":"threatline.record/2","record":{"id":"CVE-2026-98449","aliases":[],"summary":"smb: client: delete compound mids on send failure before unlock","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: delete compound mids on send failure before unlock\n\nWhen sending a compound request fails, smb_send_rqst() kicks off a\nreconnect. compound_send_recv() still has those mids on pending_mid_q,\nbut it unlocks the server without removing them first.\n\nDuring reconnect, cifs_abort_connection() walks pending_mid_q and runs\neach mid callback. With no response yet, those callbacks return credits\nand drop in_flight. Then compound_send_recv()'s send-error path returns\nthe same credits again. in_flight ends up decremented twice and\nsmb2_add_credits() WARNs.\n\nsyzbot hits this during SMB2_negotiate when the socket send fails.\n\ncifs_call_async() already calls delete_mid() before unlock on send\nfailure. Do the same for compound chains and set cancelled_mid[] so the\nout: path does not delete them again.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98449","source_modified_at":"2026-10-19T09:19:44.655Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"ee258d79159afed52ca9372aeb9c1a51e89b32ee","lessThan":"70783946f3b5d0c06ec7df0f5e7bec2bfad24efb","status":"affected","versionType":"git"},{"version":"ee258d79159afed52ca9372aeb9c1a51e89b32ee","lessThan":"8f6f8a48399f82f4a83f7b9f25b9707e0062a4f9","status":"affected","versionType":"git"},{"version":"3c57a0be487088b08d9c88998f911eb4a7ba36e4","status":"affected","versionType":"git"},{"version":"4.20.11","lessThan":"4.21","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98449","source_modified_at":"2026-10-19T09:19:44.655Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.0","status":"affected"},{"version":"0","lessThan":"5.0","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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-2026-98449","source_modified_at":"2026-10-19T09:19:44.655Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"70783946f3b5d0c06ec7df0f5e7bec2bfad24efb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98449","source_modified_at":"2026-10-19T09:19:44.655Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8f6f8a48399f82f4a83f7b9f25b9707e0062a4f9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98449","source_modified_at":"2026-10-19T09:19:44.655Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4.21","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00162,"percentile":0.05093,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:14:59.772Z","modified_at":"2026-10-19T09:19:44.655Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98449","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:19:44.655Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98449","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/70783946f3b5d0c06ec7df0f5e7bec2bfad24efb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8f6f8a48399f82f4a83f7b9f25b9707e0062a4f9"}],"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":"2026-10-19T09:19:44.655Z","content_hash":"39fa6697378edbfd43c4d1030cd10d96daad975ebe2db9a20b52bc8125c88a77"}}