VYPR
Unrated severityNVD Advisory· Published Feb 26, 2025· Updated Dec 23, 2025

ext4: avoid cycles in directory h-tree

CVE-2022-49343

Description

In the Linux kernel, the following vulnerability has been resolved:

ext4: avoid cycles in directory h-tree

A maliciously corrupted filesystem can contain cycles in the h-tree stored inside a directory. That can easily lead to the kernel corrupting tree nodes that were already verified under its hands while doing a node split and consequently accessing unallocated memory. Fix the problem by verifying traversed block numbers are unique.

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Affected products

136

Patches

Vulnerability mechanics

References

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