{ "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" } } } }