SB20251230266 - Improper locking in Linux kernel bluetooth
Published: December 30, 2025 Updated: December 30, 2025
Security Bulletin ID
SB20251230266
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2022-50833)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the handle_cmd_cnt_and_timer() function in net/bluetooth/hci_event.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3c6b036fe5c8ed8b6c4cbdc03605929882907ef0
- https://git.kernel.org/stable/c/c4635cf3d845a7324c25c52d549b70c8bd7ad4c7
- https://git.kernel.org/stable/c/deee93d13d385103205879a8a0915036ecd83261
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.1
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1