{"cve":"CVE-2026-90092","nvd":{"published":"2026-09-17T17:17:00.757","modified":"2026-10-19T09:18:58.417","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: reject accept queue add unless BT_LISTEN\n\nNew sk should not be added to parent socket accept queue after last\nl2cap_sock_cleanup_listen() has run in l2cap_sock_teardown_cb() and\nstate set to BT_CLOSED, as that can result to UAF on dereferencing the\ndangling parent reference.\n\nl2cap_sock_new_connection_cb() may race with parent l2cap_chan teardown,\ndue to chan->state accessed without consistent locking:\n\n  [Task 1]                           [Task 2]\n  l2cap_sock_release(parent)         l2cap_connect\n    l2cap_sock_shutdown                pchan = l2cap_global_chan_by_psm\n      l2cap_chan_lock(pchan)\n      l2cap_chan_close\n        l2cap_sock_teardown_cb\n          pchan->state = BT_CLOSED\n      l2cap_chan_unlock(pchan) ------> l2cap_chan_lock(pchan)\n                                       l2cap_new_connection\n                                         l2cap_sock_new_connection_cb\n      l2cap_chan_lock(pchan) <-------- l2cap_chan_unlock(pchan)\n      l2cap_sock_kill(parent)          /* bt_sk(sk)->parent dangling */\n\nFix by adding check for sk_state == BT_LISTEN after acquiring sk lock in\nl2cap_sock_new_connection_cb().  Add lock_sock() around sk_state writes\nwhere missing, to avoid data races.\n\nAlthough the data races on pchan->state should be fixed too, this\ndefensive sk_state check probably makes sense in any case.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.0},"cwes":[],"references":["https://git.kernel.org/stable/c/2a3a27aaf19bf069720e024ce6fde54e6bf80df9","https://git.kernel.org/stable/c/491e4c60017969b053888029998d2a61f298986a","https://git.kernel.org/stable/c/87276dc15b559d32757a43b4415c8445fbae06c4","https://git.kernel.org/stable/c/bf61a65c6093970e3b50031c4b79ebf3bd411eba","https://git.kernel.org/stable/c/c47339e169bf4a0a4cfabb91351471f67744c2bc"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-90092","score":0.00362,"percentile":0.29789,"date":"2026-10-26"},"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."]}