#VU104953 Use-after-free in Linux kernel - CVE-2025-21796
Published: February 27, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104953
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-2025-21796
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 posix_acl_release() function in fs/nfsd/nfs3acl.c, within the posix_acl_release() function in fs/nfsd/nfs2acl.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/1fd94884174bd20beb1773990fd3b1aa877688d9
- https://git.kernel.org/stable/c/2e59b2b68782519560b3d6a41dd66a3d01a01cd3
- https://git.kernel.org/stable/c/55d947315fb5f67a35e4e1d3e01bb886b9c6decf
- https://git.kernel.org/stable/c/7faf14a7b0366f153284db0ad3347c457ea70136
- https://git.kernel.org/stable/c/f8d871523142f7895f250a856f8c4a4181614510
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.16