{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74510","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.909Z","datePublished":"2026-08-15T12:27:32.503Z","dateUpdated":"2026-08-23T12:47:31.049Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-23T12:47:31.049Z"},"descriptions":[{"lang":"en","value":"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 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."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The UAF is triggered through local AF_BLUETOOTH HCI_CHANNEL_CONTROL management commands (hci_sock_bind/sendmsg -> hci_mgmt_cmd -> pair_device/cancel_pair_device); remote Bluetooth peers cannot issue MGMT_OP_PAIR_DEVICE or MGMT_OP_CANCEL_PAIR_DEVICE over the air.\nAC:L - An attacker controls the race by concurrently issuing MGMT_OP_PAIR_DEVICE and MGMT_OP_CANCEL_PAIR_DEVICE from threads or sockets they own while pairing HCI callbacks fire, and can retry until cancel and completion/auth/SMP paths interleave on the same pending command.\nPR:L - pair_device and cancel_pair_device lack HCI_MGMT_UNTRUSTED and require HCI_SOCK_TRUSTED (CAP_NET_ADMIN at bind); per kernel CNA guidance CAP_NET_ADMIN reachable via unprivileged user namespaces (unshare -Urn) maps to PR:L, consistent with similar Bluetooth mgmt UAF scores.\nUI:N - No victim interaction is required beyond a powered Bluetooth controller; the attacker directly sends the conflicting PAIR_DEVICE and CANCEL_PAIR_DEVICE management commands that create the pending entry and race the unlocked find_pairing/pending_find paths against completion callbacks.\nS:U - Exploitation corrupts kernel Bluetooth MGMT heap objects (mgmt_pending_cmd) within the same host kernel security authority; this is standard local kernel memory corruption, not a VM, IOMMU, or cross-authority boundary escape.\nC:H - Use-after-free of mgmt_pending_cmd when find_pairing or pending_find returns a still-linked command without holding mgmt_pending_lock through later dereference and mgmt_pending_remove, enabling arbitrary kernel memory disclosure via slab reuse of the freed object.\nI:H - Slab UAF and double list_del on mgmt_pending_cmd during concurrent cancel_pair_device and pairing/auth/SMP completion callbacks provide attacker-influenced heap corruption primitives exploitable for arbitrary kernel writes and control-flow hijacking per kernel UAF guidance.\nA:H - Dereferencing or list_del on a freed mgmt_pending_cmd during the cancel versus callback race causes kernel oops or panic; repeated concurrent PAIR_DEVICE and CANCEL_PAIR_DEVICE commands during active pairing can reliably crash or hang the system."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/mgmt.c"],"versions":[{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"50af4280a587c9971b5388cbc438f1324e626b7b","status":"affected","versionType":"git"},{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"86ed4dd6548ccf277bc691bc912ca06e76b9d80c","status":"affected","versionType":"git"},{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"7c2a152a897cd1c184b2051484d4f74d803e7f4a","status":"affected","versionType":"git"},{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"c569def320aa8b1fde89227e2ea96606790fd86d","status":"affected","versionType":"git"},{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"51be7280980fddc90ebe874a69c2fe8ab02bb46a","status":"affected","versionType":"git"},{"version":"e9a416b5ce0c0f93819f55d34cf6882196e9c3b2","lessThan":"d0a7b48ad0921bd88effaee10bf970ab1d5d0ddd","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/mgmt.c"],"versions":[{"version":"2.6.39","status":"affected"},{"version":"0","lessThan":"2.6.39","status":"unaffected","versionType":"semver"},{"version":"6.1.184","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.151","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.103","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.44","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.8","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"2.6.39","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.39","versionEndExcluding":"7.2"}]}]}],"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"}],"title":"Bluetooth: mgmt: fix UAF in pair command cancellation","x_generator":{"engine":"bippy-1.2.0"}}}}