{"id":"CVE-2026-90092","revision":"dfc8dbcaab7847c4b9fc99a87fad89d4","records":[{"revision":"dfc8dbcaab7847c4b9fc99a87fad89d4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-90092","aliases":[],"title":"Bluetooth: L2CAP: reject accept queue add unless BT_LISTEN","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.","state":0,"publishedAt":"2026-09-17T16:06:06.197+00:00","modifiedAt":"2026-10-19T08:57:50.446+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/l2cap_sock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0c17c8832562b2aac288e89cefd0f46074f54bcb\",\n                            \"lessThan\": \"bf61a65c6093970e3b50031c4b79ebf3bd411eba\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5105f3e6b2df619c635b5f6a49fac131a36c7952\",\n                            \"lessThan\": \"491e4c60017969b053888029998d2a61f298986a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c88c185ae0a1067823661b220aeea613df2c127b\",\n                            \"lessThan\": \"2a3a27aaf19bf069720e024ce6fde54e6bf80df9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1810e42ff6716f320c7269d5850eca48b07b7427\",\n                            \"lessThan\": \"87276dc15b559d32757a43b4415c8445fbae06c4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2ff1a41a912de8517b4482e946dd951b7d80edbf\",\n                            \"lessThan\": \"c47339e169bf4a0a4cfabb91351471f67744c2bc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2ff1a41a912de8517b4482e946dd951b7d80edbf\",\n                            \"lessThan\": \"d4bfa78fd67929b62b02013c107973e0c5b7aa9a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1b1c0da227bf63479bac9982fc8d12df9aaea0fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"85426e97dc72f2088ba6d27e74cd58c3fbd43e31\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a2dcf1a61d056aef15b63c6eae9441344d624389\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThan\": \"6.1.188\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.140\",\n                            \"lessThan\": \"6.6.157\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.88\",\n                            \"lessThan\": \"6.12.110\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.30\",\n                            \"lessThan\": \"6.18.52\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThan\": \"5.11\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThan\": \"5.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.7\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bluetooth/l2cap_sock.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/bf61a65c6093970e3b50031c4b79ebf3bd411eba","https://git.kernel.org/stable/c/491e4c60017969b053888029998d2a61f298986a","https://git.kernel.org/stable/c/2a3a27aaf19bf069720e024ce6fde54e6bf80df9","https://git.kernel.org/stable/c/87276dc15b559d32757a43b4415c8445fbae06c4","https://git.kernel.org/stable/c/c47339e169bf4a0a4cfabb91351471f67744c2bc","https://git.kernel.org/stable/c/d4bfa78fd67929b62b02013c107973e0c5b7aa9a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-90092","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-90092","identifiers":["CVE-2026-90092"]},"retained":false,"historicalAffected":[]}],"coverage":[]}