SB2025120873 - Use-after-free in Linux kernel proc
Published: December 8, 2025
Security Bulletin ID
SB2025120873
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-2025-40271)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the pde_put(), remove_proc_entry() and remove_proc_subtree() functions in fs/proc/generic.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/03de7ff197a3d0e17d0d5c58fdac99a63cba8110
- https://git.kernel.org/stable/c/1d1596d68a6f11d28f677eedf6cf5b17dbfeb491
- https://git.kernel.org/stable/c/4cba73c4c89219beef7685a47374bf88b1022369
- https://git.kernel.org/stable/c/623bb26127fb581a741e880e1e1a47d79aecb6f8
- https://git.kernel.org/stable/c/67272c11f379d9aa5e0f6b16286b9d89b3f76046
- https://git.kernel.org/stable/c/6f2482745e510ae1dacc9b090194b9c5f918d774
- https://git.kernel.org/stable/c/895b4c0c79b092d732544011c3cecaf7322c36a1
- https://git.kernel.org/stable/c/c81d0385500446efe48c305bbb83d47f2ae23a50