Resource Management Vulnerability in Linux Kernel Affects Multiple Platforms

CVE-2025-38256

What is CVE-2025-38256?

A resource management issue in the Linux kernel's handling of io_uring has been identified, where the system attempts to unpin the head page of a folio after successfully pinning a tail page. This can lead to an unmapping failure, triggering internal errors and debug warnings. The fault occurs during the processing of user pages, which can compromise stability and performance in systems utilizing io_uring. A fix has been implemented to replace the method of unpinning to enhance reliability.

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