CVE-2026-46056
Published May 27, 2026
Modified May 27, 2026
Description
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.
References
Other References
https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47
https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2
https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993
https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7
https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8
Frequently Asked Questions
What is CVE-2026-46056? +
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.
How do I check if I'm vulnerable to CVE-2026-46056? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.