CVE-2026-45942

A flaw was found in the Linux kernel's ext4 filesystem. A race condition exists between page migration and bitmap modification within the load_buddy function. This can lead to bitmap inconsistencies and false positive corruption reports during certain workloads. This issue can affect data integrity reporting and system stability.

This vulnerability is rated as Moderate severity because triggering the issue requires local access and precise race timing during concurrent page migration and filesystem block allocation. In typical Red Hat Enterprise Linux environments, hit rates for this timing window are minimal and primarily manifest during intensive stress workloads involving mixed huge-page memory usage. While an inconsistent state could potentially disrupt filesystem operations or cause system instability, the high complexity and prerequisites of the race limit practical exploitability.

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.