Page Table Management Flaw in Linux Kernel Affects Multiple Versions

CVE-2025-38084

What is CVE-2025-38084?

The Linux kernel contains a vulnerability related to the management of hugetlb page tables during the splitting of virtual memory areas (VMAs). The flaw arises from the timing of the hugetlb page table unsharing, which occurs prematurely before the necessary locks are acquired. This issue can lead to race conditions that allow page tables to be inadvertently shared, compromising the integrity of memory management in the kernel. The fix involves modifying the unsharing logic to occur after proper locking, thereby mitigating the race condition and enhancing overall kernel security.

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