CVE-2022-49343

low-risk
Published 2025-02-26

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.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (8)

Patch https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3
Patch https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc
Patch https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2
Patch https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1
Patch https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0
Patch https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f
Patch https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60
Patch https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal