Peter Xu

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The issue is related to the Linux kernel's page table check functionality, specifically with ZONE DEVICE pages that map PFNs directly and do not allocate page ext. When both ZONE DEVICE and page-table-check are enabled, and an attempt is made to map dax memories, a kernel bug can be triggered, causing a crash. This is because the pgtable checker does not account for the absence of page ext in ZONE DEVICE pages, leading to an error when trying to inject pfn maps on the dax device. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.