SB2025100414 - Use-after-free in Linux kernel um drivers
Published: October 4, 2025
Security Bulletin ID
SB2025100414
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-2025-39951)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the virtio_uml_probe() function in arch/um/drivers/virtio_uml.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/00e98b5a69034b251bb36dc6e7123d7648e218e4
- https://git.kernel.org/stable/c/14c231959a16ca41bfdcaede72483362a8c645d7
- https://git.kernel.org/stable/c/4f364023ddcfe83f7073b973a9cb98584b7f2a46
- https://git.kernel.org/stable/c/5e94e44c9cb30d7a383d8ac227f24a8c9326b770
- https://git.kernel.org/stable/c/7ebf70cf181651fe3f2e44e95e7e5073d594c9c0
- https://git.kernel.org/stable/c/aaf900a83508c8cd5cdf765e7749f9076196ec7f
- https://git.kernel.org/stable/c/c2ff91255e0157b356cff115d8dc3eeb5162edf2