{"id":"CVE-2026-74510","title":"Bluetooth: mgmt: fix UAF in pair command cancellation","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix UAF in pair command cancellation\n\nThe pairing completion and authentication failure callbacks look up the\npending MGMT_OP_PAIR_DEVICE command by wa…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 50af4280a587c9971b5388cbc438f1324e626b7b","Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 86ed4dd6548ccf277bc691bc912ca06e76b9d80c","Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 7c2a152a897cd1c184b2051484d4f74d803e7f4a","Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < c569def320aa8b1fde89227e2ea96606790fd86d","Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 51be7280980fddc90ebe874a69c2fe8ab02bb46a","Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd","Linux 2.6.39"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:58:39.693080Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:51.530Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74510","references":[{"url":"https://git.kernel.org/stable/c/50af4280a587c9971b5388cbc438f1324e626b7b"},{"url":"https://git.kernel.org/stable/c/86ed4dd6548ccf277bc691bc912ca06e76b9d80c"},{"url":"https://git.kernel.org/stable/c/7c2a152a897cd1c184b2051484d4f74d803e7f4a"},{"url":"https://git.kernel.org/stable/c/c569def320aa8b1fde89227e2ea96606790fd86d"},{"url":"https://git.kernel.org/stable/c/51be7280980fddc90ebe874a69c2fe8ab02bb46a"},{"url":"https://git.kernel.org/stable/c/d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd"}],"tags":["cve.org"],"epss":0.00139,"epssPercentile":0.0295,"ingestedAt":"2026-10-16T19:46:24.351Z","slug":"CVE-2026-74510","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: fix UAF in pair command cancellation\n\nThe pairing completion and authentication failure callbacks look up the\npending MGMT_OP_PAIR_DEVICE command by walking hdev->mgmt_pending. The\nlookup returned a command that was still linked on the shared pending list,\nwithout keeping mgmt_pending_lock held for the later dereference and\nremoval.\n\nA concurrent MGMT_OP_CANCEL_PAIR_DEVICE request can remove and free the\nsame pending command before the callback uses it. The reverse race is also\npossible when cancel_pair_device() gets a command from pending_find() and a\ncallback removes it before the cancel path dereferences it. This can lead\nto a use-after-free and a second list_del().\n\nMake the pairing lookup helpers transfer ownership of the pending command\nby removing it from hdev->mgmt_pending while holding mgmt_pending_lock.\nThe callbacks and cancel path then complete the command and free it\ndirectly, so racing paths cannot find or free the same command again. Take\na temporary hci_conn reference in cancel_pair_device() because the command\ncompletion drops the reference stored in the pending command.\n\n## Affected\n\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 50af4280a587c9971b5388cbc438f1324e626b7b`\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 86ed4dd6548ccf277bc691bc912ca06e76b9d80c`\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 7c2a152a897cd1c184b2051484d4f74d803e7f4a`\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < c569def320aa8b1fde89227e2ea96606790fd86d`\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < 51be7280980fddc90ebe874a69c2fe8ab02bb46a`\n- `Linux >= e9a416b5ce0c0f93819f55d34cf6882196e9c3b2 < d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd`\n- `Linux 2.6.39`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}