Memory Access Vulnerability in Linux Kernel Affecting Btrfs

CVE-2025-21679

Summary

A vulnerability in the Linux kernel's Btrfs file system arises from inadequate error handling within the get_canonical_dev_path() function. When the d_path() function fails and returns an error, it can lead to an invalid memory access during the subsequent strscpy() call, potentially allowing for unexpected behavior or crashes. Proper error handling has been added to mitigate this issue, ensuring the stability and security of the Linux kernel.

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