SB2025120866 - Use-after-free in Linux kernel bridge
Published: December 8, 2025
Security Bulletin ID
SB2025120866
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-2025-40297)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the net/bridge/br_private.h. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3b60ce334c1ce8b3fad7e02dcd5ed9f6646477c8
- https://git.kernel.org/stable/c/8dca36978aa80bab9d4da130c211db75c9e00048
- https://git.kernel.org/stable/c/991fbe1680cd41a5f97c92cd3a3496315df36e4b
- https://git.kernel.org/stable/c/bf3843183bc3158e5821b46f330c438ae9bd6ddb
- https://git.kernel.org/stable/c/e19085b2a86addccff33ab8536fc67ebd9d52198