Linux Kernel up to 6.0.15/6.1.1 erofs z_erofs_get_extent_compressedlen buffer overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.0.15/6.1.1. The affected element is the function z_erofs_get_extent_compressedlen of the component erofs. This manipulation causes buffer overflow. This vulnerability appears as CVE-2022-50811. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.0.15/6.1.1 and classified as critical. Affected by this vulnerability is the function z_erofs_get_extent_compressedlen of the component erofs. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: erofs: fix missing unmap if z_erofs_get_extent_compressedlen() fails Otherwise, meta buffers could be leaked.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2022-50811 since 12/30/2025. The exploitation appears to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/31/2025).

The vulnerability scanner Nessus provides a plugin with the ID 281532 (Linux Distros Unpatched Vulnerability : CVE-2022-50811), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.0.16 or 6.1.2 eliminates this vulnerability. Applying the patch 091a8ca572a2e48554427feda78aa503e98c1028/373b6f350aecf5dca2e7474f0b4ec8cca659f2f0/d5d188b8f8b38d3d71dd05993874b4fc9284ce95 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (281532). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.1.0
• 6.1.1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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