CVE-2022-49343: linux kernel — Fix

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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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.14.283
linux	linux_kernel	4.15 — 4.19.247
linux	linux_kernel	4.20 — 5.4.198
linux	linux_kernel	5.5 — 5.10.121
linux	linux_kernel	5.11 — 5.15.46
linux	linux_kernel	5.16 — 5.17.14
linux	linux_kernel	5.18 — 5.18.3

References

Advisories & Patches

https://git.kernel.org/stable/c/24b8206fec1db21d7e82f21f0b2ff5e5672cf5b3 https://git.kernel.org/stable/c/3a3ce941645407cd0b0b7f01ad9e2ea3770f46cc https://git.kernel.org/stable/c/3ba733f879c2a88910744647e41edeefbc0d92b2 https://git.kernel.org/stable/c/6084240bfc44bf265ab6ae7d96980469b05be0f1 https://git.kernel.org/stable/c/b3ad9ff6f06c1dc6abf7437691c88ca3d6da3ac0 https://git.kernel.org/stable/c/d5a16a6df2c16eaf4de04948553ef0089dee463f https://git.kernel.org/stable/c/e157c8f87e8fac112d6c955e69a60cdb9bc80a60 https://git.kernel.org/stable/c/ff4cafa51762da3824881a9000ca421d4b78b138

Frequently Asked Questions

What is CVE-2022-49343? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49343? +

CVE-2022-49343 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2022-49343? +

CVE-2022-49343 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2022-49343? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2022-49343