Vulnerability in Linux Kernel's Bcachefs Product by The Linux Foundation

CVE-2025-22019

Summary

A vulnerability was identified in the Bcachefs component of the Linux Kernel, where the bch2_ioctl_subvolume_destroy() function had issues due to improper pruning of the directory cache (dcache). This flaw resulted in the potential to block processes while evicting subvolume inodes, which could lead to degraded performance and system instability. Additionally, the vulnerability included missing permission checks that could allow unauthorized actions. Appropriate fixes were implemented to enhance the integrity and reliability of the Bcachefs filesystem.

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