Concurrency Issue in Linux Kernel's hfsplus Filesystem

CVE-2025-38650

What is CVE-2025-38650?

The hfsplus filesystem of the Linux kernel has a concurrency-related issue that arises during operations such as file truncation and attribute changes. These operations can lead to multiple threads attempting to lock a shared extents tree concurrently, resulting in unexpected warnings. The implemented fix aims to avoid potential deadlock scenarios during file operations by ensuring that the check for locked extents is appropriately handled. If the extree is locked by one thread while another attempts to perform actions on it, this can trigger abnormal behavior and subject the system to unnecessary warnings.

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