CVE-2026-46056
HIGH severity · CVSS 8.8 · Use-after-free
8.8CVSS HIGH
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.
Impact & exploitability
Attack vectorAdjacent
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47Patch
- https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2Patch
- https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993Patch
- https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7Patch
- https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903efPatch
- https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8Patch
- https://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5
- https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7