{"cve":"CVE-2026-98175","nvd":{"published":"2026-10-06T09:17:59.477","modified":"2026-10-19T10:18:17.840","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.5},"cwes":[],"references":["https://git.kernel.org/stable/c/180380272f116dbd2b0354c5c7872e112e519149","https://git.kernel.org/stable/c/2e5103e11a17c274715dd56cf185eeedccf686b8","https://git.kernel.org/stable/c/7ab9ceedd860216fb97f2d8574cbe58b8906f42a","https://git.kernel.org/stable/c/c65eae6f61d1778ff7a82e4aae4080e26f486af1","https://git.kernel.org/stable/c/e3f6a779433d13aafb5edab59e4f9313051e8a52"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-98175","score":0.00321,"percentile":0.24856,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}