Vulnerability in Linux Kernel Affects Memory Management Functionality

CVE-2026-53373

What is CVE-2026-53373?

A vulnerability in the Linux kernel's memory management system has been identified, primarily affecting the mmap_prepare and mmap functionalities. This issue arises when the mmap_prepare hook is invoked from the mmap() handler of certain stacked drivers, leading to attempts to unmap a Virtual Memory Area (VMA) that is not yet fully established. Consequently, this situation can trigger warning messages due to the detached state of the VMA. The vulnerability is resolved by differentiating the completion of mmap actions through a compatibility layer, preventing unnecessary cleanup actions during error handling. This fix enhances the overall stability of the memory management processes in the Linux kernel.

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