{"schema":"threatline.record/2","record":{"id":"CVE-2026-98175","aliases":[],"summary":"smb: client: cancel reconnect work in clean_demultiplex_info()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: cancel reconnect work in clean_demultiplex_info()\n\nclean_demultiplex_info() cancels server->echo delayed work but not\nserver->reconnect, which can cause a use-after-free when the\ndemultiplex thread exits while a reconnect work is still queued:\n\n  cifs_demultiplex_thread()\n    cifs_readv_from_socket()\n      cifs_reconnect()\n        __cifs_reconnect()\n          cifs_queue_server_reconn()\n            mod_delayed_work(cifsiod_wq, &server->reconnect, 0)\n    clean_demultiplex_info()\n      cancel_delayed_work_sync(&server->echo)   // echo canceled\n                                                 // reconnect NOT canceled\n      kfree_sensitive(server)                    // server freed\n\n  ...later, on cifsiod_wq:\n\n  smb2_reconnect_server()\n    server->srv_count  // UAF read of freed server\n\nFix this by canceling server->reconnect delayed work in\nclean_demultiplex_info() before the server is freed, the same way\ncifs_put_tcp_session() already does.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98175","source_modified_at":"2026-10-19T09:15:06.742Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"53e0e11efe9289535b060a51d4cf37c25e0d0f2b","lessThan":"180380272f116dbd2b0354c5c7872e112e519149","status":"affected","versionType":"git"},{"version":"53e0e11efe9289535b060a51d4cf37c25e0d0f2b","lessThan":"e3f6a779433d13aafb5edab59e4f9313051e8a52","status":"affected","versionType":"git"},{"version":"53e0e11efe9289535b060a51d4cf37c25e0d0f2b","lessThan":"7ab9ceedd860216fb97f2d8574cbe58b8906f42a","status":"affected","versionType":"git"},{"version":"53e0e11efe9289535b060a51d4cf37c25e0d0f2b","lessThan":"2e5103e11a17c274715dd56cf185eeedccf686b8","status":"affected","versionType":"git"},{"version":"53e0e11efe9289535b060a51d4cf37c25e0d0f2b","lessThan":"c65eae6f61d1778ff7a82e4aae4080e26f486af1","status":"affected","versionType":"git"},{"version":"e008a962311a875a828cbae54b43285858aaa6c8","status":"affected","versionType":"git"},{"version":"123b228a09b90b50b0a9d6eb8294cf0c42efc029","status":"affected","versionType":"git"},{"version":"0ba4c6eaaacbcc4b18f51bb3b1567c65a8fecca9","status":"affected","versionType":"git"},{"version":"d0d2a4c82942e2f51e4984beea1f7e5a994bd06c","status":"affected","versionType":"git"},{"version":"15a12fbbf365a483b1c19f9caeb707b3bea77e10","status":"affected","versionType":"git"},{"version":"f0b715409cb9cf7e21e690f9b163047739761962","status":"affected","versionType":"git"},{"version":"ff04da387c10b6bf7b510392742c8cd46c130fd6","status":"affected","versionType":"git"},{"version":"48f9526f4dcb4b132fe0dc2450835311e3b013a6","status":"affected","versionType":"git"},{"version":"3.10.107","lessThan":"3.11","status":"affected","versionType":"semver"},{"version":"3.12.70","lessThan":"3.13","status":"affected","versionType":"semver"},{"version":"3.16.42","lessThan":"3.17","status":"affected","versionType":"semver"},{"version":"3.18.47","lessThan":"3.19","status":"affected","versionType":"semver"},{"version":"4.1.38","lessThan":"4.2","status":"affected","versionType":"semver"},{"version":"4.4.40","lessThan":"4.5","status":"affected","versionType":"semver"},{"version":"4.8.16","lessThan":"4.9","status":"affected","versionType":"semver"},{"version":"4.9.1","lessThan":"4.10","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98175","source_modified_at":"2026-10-19T09:15:06.742Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.10","status":"affected"},{"version":"0","lessThan":"4.10","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-2026-98175","source_modified_at":"2026-10-19T09:15:06.742Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"180380272f116dbd2b0354c5c7872e112e519149","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98175","source_modified_at":"2026-10-19T09:15:06.742Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"7ab9ceedd860216fb97f2d8574cbe58b8906f42a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98175","source_modified_at":"2026-10-19T09:15:06.742Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"2e5103e11a17c274715dd56cf185eeedccf686b8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE 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List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98175","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:06.742Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98175","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/180380272f116dbd2b0354c5c7872e112e519149"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/e3f6a779433d13aafb5edab59e4f9313051e8a52"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7ab9ceedd860216fb97f2d8574cbe58b8906f42a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/2e5103e11a17c274715dd56cf185eeedccf686b8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c65eae6f61d1778ff7a82e4aae4080e26f486af1"}],"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":"2026-10-19T09:15:06.742Z","content_hash":"f790218dca88dceedc13b9f9d8afd365119a4cbffb301123ef542ca59e32d879"}}