#VU116456 Use-after-free in Linux kernel - CVE-2025-39951
Published: October 4, 2025
Vulnerability identifier: #VU116456
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-39951
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 repository.
External links
- 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