SB2025120455 - Use-after-free in Linux kernel vmw_vsock
Published: December 4, 2025
Security Bulletin ID
SB2025120455
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-2025-40248)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the vsock_connect() function in net/vmw_vsock/af_vsock.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/002541ef650b742a198e4be363881439bb9d86b4
- https://git.kernel.org/stable/c/3f71753935d648082a8279a97d30efe6b85be680
- https://git.kernel.org/stable/c/5998da5a8208ae9ad7838ba322bccb2bdcd95e81
- https://git.kernel.org/stable/c/ab6b19f690d89ae4709fba73a3c4a7911f495b7a
- https://git.kernel.org/stable/c/f1c170cae285e4b8f61be043bb17addc3d0a14b5