{"id":"CVE-2026-53072","title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hd…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < c7777f534a8018ae4bb1c80d8925af4df588a314","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 6b4d226d01ab7da0d2027a2a1e3a6079152e5065","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 385b2d0468a0871fc716c549fa3b0c257c7dbcb3","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < c27224daf0b08efbb2b24ed64b6139b294f5473a","Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 5c7209a341ff2ac338b2b0375c34a307b37c9ac2","Linux 3.17"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T15:25:12.695617Z"},"published":"2026-06-24","updated":"2026-10-16","sourceUpdated":"2026-10-16T15:31:30.673Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53072","references":[{"url":"https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4"},{"url":"https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e"},{"url":"https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314"},{"url":"https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065"},{"url":"https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f"},{"url":"https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3"},{"url":"https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a"},{"url":"https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2"}],"tags":["cve.org"],"epss":0.00195,"epssPercentile":0.08574,"ingestedAt":"2026-10-16T17:24:46.729Z","slug":"CVE-2026-53072","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER\n\nWhen protocol sets HCI_PROTO_DEFER, hci_conn_request_evt() calls\nhci_connect_cfm(conn) without hdev->lock. Generally hci_connect_cfm()\nassumes it is held, and if conn is deleted concurrently -> UAF.\n\nOnly SCO and ISO set HCI_PROTO_DEFER and only for defer setup listen,\nand HCI_EV_CONN_REQUEST is not generated for ISO.  In the non-deferred\nlistening socket code paths, hci_connect_cfm(conn) is called with\nhdev->lock held.\n\nFix by holding the lock.\n\n## Affected\n\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < c7777f534a8018ae4bb1c80d8925af4df588a314`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 6b4d226d01ab7da0d2027a2a1e3a6079152e5065`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 385b2d0468a0871fc716c549fa3b0c257c7dbcb3`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < c27224daf0b08efbb2b24ed64b6139b294f5473a`\n- `Linux >= 70c464256310e1c3716099b9d02ece4169272f73 < 5c7209a341ff2ac338b2b0375c34a307b37c9ac2`\n- `Linux 3.17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}