CVE-2026-46056 (CVSS 8.8)

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.

Is your site exposed to CVE-2026-46056?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0026

Probability of exploitation

0.17%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

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/b6ae482f88654db407c8c17619d4b62959b903ef 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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-46056? +

CVE-2026-46056 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0026, placing it in the 0th percentile for exploitation probability.

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.

CVE-2026-46056