{"id":"CVE-2026-53072","revision":null,"records":[{"revision":"da084e2462484800a2873e93f8748f84","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53072","aliases":[],"title":"Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER","description":"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 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.","state":0,"publishedAt":"2026-06-24T16:30:13.57+00:00","modifiedAt":"2026-10-19T19:47:15.316+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/hci_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"c7777f534a8018ae4bb1c80d8925af4df588a314\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"6b4d226d01ab7da0d2027a2a1e3a6079152e5065\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"385b2d0468a0871fc716c549fa3b0c257c7dbcb3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"c27224daf0b08efbb2b24ed64b6139b294f5473a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"70c464256310e1c3716099b9d02ece4169272f73\",\n \"lessThan\": \"5c7209a341ff2ac338b2b0375c34a307b37c9ac2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\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/hci_event.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.17\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.17\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.141\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.91\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.33\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.10\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\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:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4","https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e","https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314","https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065","https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f","https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3","https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a","https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53072","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53072","identifiers":["CVE-2026-53072"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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