SB20251210116 - Improper locking in Linux kernel devlink
Published: December 10, 2025 Updated: December 12, 2025
Security Bulletin ID
SB20251210116
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-2023-53841)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the devlink_notify_unregister() function in net/devlink/leftover.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/21b9e0efb38eac1fe7bed369e96980cad45aa9c7
- https://git.kernel.org/stable/c/2864cc9a1fd13666ed7fd9064dc3f2c51a85de32
- https://git.kernel.org/stable/c/408d40c729cbe3a918a381405df769491a472122
- https://git.kernel.org/stable/c/7552020e3aa8283b215ca6b3840e6f9281ee4664
- https://git.kernel.org/stable/c/970c7035f4b03c7be9f49c403ccf6fb0b70039a1
- https://git.kernel.org/stable/c/a52305a81d6bb74b90b400dfa56455d37872fe4b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.188
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.150
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.251
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.42
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5