Use-after-free in Linux kernel - CVE-2025-39872
Published: September 23, 2025
Vulnerability identifier: #VU116040
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2025-39872
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hsr_get_port_ndev() function in net/hsr/hsr_device.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2025-39872
Install update from vendor's repository.
linux (Debian package) - update to 6.12.69-1