{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53072", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.383Z", "datePublished": "2026-06-24T16:30:13.570Z", "dateUpdated": "2026-08-05T12:33:06.917Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:33:06.917Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable path is reached through Bluetooth HCI connection request handling for incoming SCO/eSCO connections from a nearby Bluetooth peer, so exploitation requires adjacency to the target Bluetooth radio.\nAC:L - The attacker can repeatedly initiate deferred SCO/eSCO connection attempts and race connection teardown/cleanup; when uncertain for this race, the higher-severity low-complexity rating is appropriate.\nPR:N - The remote Bluetooth peer reaches the pre-authentication connection request path without local privileges or verified credentials; local deferred-listener configuration is an environmental precondition, not attacker privilege.\nUI:N - Once the target has a deferred SCO/eSCO listener, the attacker can trigger the vulnerable HCI event without requiring a victim to perform an action.\nS:U - The bug is in the kernel Bluetooth stack and impacts the same kernel security authority; it is not a VM, sandbox, or hardware boundary escape by itself.\nC:H - The flaw is a use-after-free of an hci_conn object, and kernel heap UAFs can be leveraged for memory disclosure primitives in a plausible exploitation scenario.\nI:H - The freed hci_conn contains pointers, callback state, and protocol data used by confirmation callbacks, making control-flow or arbitrary memory corruption a defensible high-integrity impact for a kernel UAF.\nA:H - Even without full exploitation, dereferencing a concurrently freed hci_conn can crash or destabilize the kernel, causing high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_event.c" ], "versions": [ { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "c7777f534a8018ae4bb1c80d8925af4df588a314", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "6b4d226d01ab7da0d2027a2a1e3a6079152e5065", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "385b2d0468a0871fc716c549fa3b0c257c7dbcb3", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "c27224daf0b08efbb2b24ed64b6139b294f5473a", "status": "affected", "versionType": "git" }, { "version": "70c464256310e1c3716099b9d02ece4169272f73", "lessThan": "5c7209a341ff2ac338b2b0375c34a307b37c9ac2", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_event.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.1" } ] } ] } ], "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" } ], "title": "Bluetooth: fix locking in hci_conn_request_evt() with HCI_PROTO_DEFER", "x_generator": { "engine": "bippy-1.2.0" } } } }