{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46056","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.094Z","datePublished":"2026-05-27T12:57:15.150Z","dateUpdated":"2026-08-05T12:29:24.462Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:29:24.462Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise\nthe connection can be freed concurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage in both\nhandlers.\n\nKeep the existing keypress notification behavior unchanged by routing\nthe early exits through a common unlock path."}],"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 handlers process HCI Secure Simple Pairing events (User Passkey Notify / Keypress Notify) driven by a remote Bluetooth peer during SSP pairing, so the attacker must be within Bluetooth radio range (adjacent), matching kernel guidance that Bluetooth = Adjacent.\nAC:L - This is a use-after-free where a remote peer drives the passkey/keypress events while connection teardown frees the conn from a concurrent context; the attacker influences both sides of the race and can retry, and UAF bugs are scored AC:L unless the race is uncontrollable.\nPR:N - The code path is reached by a remote Bluetooth device participating in the SSP pairing handshake, requiring no credentials or privileges on the target system.\nUI:N - The handlers execute automatically when the controller forwards the SSP passkey/keypress HCI events during the pairing protocol exchange; no local user action is required to reach the vulnerable code.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The use-after-free reads fields (dst, type, dst_type, passkey) from a freed and potentially reallocated hci_conn object, which can disclose attacker-controlled or sensitive kernel heap contents.\nI:H - The handlers write to the freed object (passkey_notify and passkey_entered fields), giving a UAF write into reallocated heap memory that can be leveraged for heap grooming and control-flow corruption.\nA:H - A use-after-free on the hci_conn structure readily causes kernel oops/panic, yielding 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":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"ea18732d2614557e59f4c0d8cdbe6611aeab33b7","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"d28311539ac9f65e29308ea219ecaa48aa5e76e5","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"b6ae482f88654db407c8c17619d4b62959b903ef","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"204028af77a265e31ceb4ba7f643349a3cca72b2","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"01a6431766c35dfedb86e0cb5d3fc80c6d604a47","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"e08d75753db17aa943d7622f09d9c217b5bfd3b8","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"8c6443bb9257b780986fb67ec08565bf48ecb8d7","status":"affected","versionType":"git"},{"version":"92a25256f142d55e25f9959441cea6ddeabae57e","lessThan":"85fa3512048793076eef658f66489112dcc91993","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":"3.7","status":"affected"},{"version":"0","lessThan":"3.7","status":"unaffected","versionType":"semver"},{"version":"5.10.259","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.210","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.140","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.86","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.27","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.4","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":"3.7","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.7","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7"},{"url":"https://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5"},{"url":"https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903ef"},{"url":"https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2"},{"url":"https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47"},{"url":"https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8"},{"url":"https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7"},{"url":"https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993"}],"title":"Bluetooth: hci_event: fix potential UAF in SSP passkey handlers","x_generator":{"engine":"bippy-1.2.0"}}}}