Memory Management Flaw in Linux Kernel Affects Multiple Architectures

CVE-2025-39776

What is CVE-2025-39776?

This vulnerability in the Linux kernel arises from a failure to clear page table entries upon the destruction of memory management arguments in the debug_vm_pgtable tests. When exiting, stale entries can persist, leading to potential conflicts if another process allocates a memory structure at the same address as the stale entry. This defect primarily affects systems running a debug kernel with the CONFIG_DEBUG_VM_PGTABLE flag enabled, potentially exposing them to unexpected behavior and resource conflicts.

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