Page Table Synchronization Issue in Linux Kernel Affecting Multiple Versions

CVE-2025-39845

What is CVE-2025-39845?

A vulnerability in the Linux kernel relates to improper synchronization of page tables during the population process in systems utilizing 4-level paging and large volumes of persistent memory. This flaw can trigger intermittent boot failures and system crashes due to page faults, particularly affecting kernel mode operations. Improvements in synchronization mechanisms for both 4-level and 5-level paging address issues that can lead to data handling errors and stability concerns. The vulnerability highlights the need for rigorous memory management practices in kernel operations.

References