CVE-2026-31455

A flaw was found in the Linux kernel's XFS file system. During the unmount process, the system attempts to flush data while background cleanup and inode garbage collection (inodegc) operations are still active. This improper synchronization can lead to data integrity issues or system instability, as critical file system operations may conflict.

This vulnerability is rated with a Moderate severity for Red Hat because triggering the flaw requires local interaction during administrative filesystem teardown, restricting the overall blast radius to a localized denial of service or filesystem inconsistency. While XFS is the default root filesystem on modern Red Hat Enterprise Linux releases, unmounting active filesystems typically requires administrative privileges. An unprivileged local attacker cannot independently unmount storage volumes, making exploitation depend on concurrent background activity coinciding with privileged administrative actions.

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.