SB2025120861 - Use-after-free in Linux kernel bluetooth
Published: December 8, 2025
Security Bulletin ID
SB2025120861
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2025-40318)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hci_cmd_sync_dequeue_once() function in net/bluetooth/hci_sync.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/09b0cd1297b4dbfe736aeaa0ceeab2265f47f772
- https://git.kernel.org/stable/c/0a94f7e017438935c09ef833a1aa908ad9875213
- https://git.kernel.org/stable/c/932c0a4f77ac13e526fdd5b42914d29c9821d389
- https://git.kernel.org/stable/c/9cd536970192b72257afcdfba0bfc09993e6f19c
- https://git.kernel.org/stable/c/ae76cf6c2c842944c6514c57df54d728f1916553