Use-after-free in Linux kernel - CVE-2025-21896
Published: April 2, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106582
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-2025-21896
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 fuse_readpages_end() and fuse_readahead() functions in fs/fuse/file.c, within the fuse_check_folio() function in fs/fuse/dev.c. A local user can escalate privileges on the system.
Affected software
Linux kernel
How to mitigate CVE-2025-21896
Install update from vendor's website.
Linux kernel - update to 6.13.6