CVE-2026-31575

A flaw was found in the Linux kernel. A mismatch in the calculation of page indexes for huge pages within the mm/userfaultfd component can lead to race conditions between threads. These race conditions can corrupt the reservation map, potentially causing a system crash and resulting in a Denial of Service (DoS).

This Moderate impact flaw in the Linux kernel's mm/userfaultfd component can lead to a denial of service. A mismatch in huge page index calculation can cause race conditions, corrupting the reservation map and resulting in a system crash. Exploitation requires local access to the system.

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.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.