CVE-2025-21879

A flaw was found in the btrfs file system component of the Linux kernel. A local attacker with low privileges could exploit a use-after-free vulnerability during the scanning of the root inode while shrinking the extent tree. This flaw could lead to a system crash, denial of service, or potentially arbitrary code execution or privilege escalation.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.