Use-after-free in Linux kernel - CVE-2025-39689
Published: September 8, 2025
Vulnerability identifier: #VU114910
CSH Severity: Low
CVSS v4.0: 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-2025-39689
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability 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 ftrace_regex_open() and ftrace_regex_release() functions in kernel/trace/ftrace.c. A local user can escalate privileges on the system.
How to mitigate CVE-2025-39689
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/12064e1880fc9202be75ff668205b1703d92f74f
- https://git.kernel.org/stable/c/3b114a3282ab1a12cb4618a8f45db5d7185e784a
- https://git.kernel.org/stable/c/64db338140d2bad99a0a8c6a118dd60b3e1fb8cb
- https://git.kernel.org/stable/c/a40c69f4f1ed96acbcd62e9b5ff3a596f0a91309
- https://git.kernel.org/stable/c/bfb336cf97df7b37b2b2edec0f69773e06d11955
- https://git.kernel.org/stable/c/c4cd93811e038d19f961985735ef7bb128078dfb
- https://git.kernel.org/stable/c/c591ba1acd081d4980713e47869dd1cc3d963d19
- https://git.kernel.org/stable/c/e0b6b223167e1edde5c82edf38e393c06eda1f13