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Linux Kernel ext4 Double Unlock Vulnerability in Directory Movement

Vulnerability

A vulnerability in the ext4 file system of the Linux kernel can lead to a double unlock scenario when moving a directory. This issue has been addressed in the Linux kernel stable tree.

Impact

The vulnerability could potentially cause file system corruption by improperly managing directory locks during rename operations.

Reproduction

The vulnerability can be reproduced by renaming a directory within an ext4 file system. The issue arises when the directory is moved, leading to a double unlock condition that could disrupt normal file system operations.

Remediation

Users can upgrade to the latest version of the Linux kernel to address this vulnerability.

Added: Oct 7, 2025, 5:53 PM
Updated: Oct 7, 2025, 5:53 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
4.3
remediation
7.7
relevance
0.7
threat
4.8
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.