npitre cramfs-tools up to 2.1 Directory cramfsck.c do_directory path traversal

Summaryinfo

A vulnerability classified as critical has been found in npitre cramfs-tools up to 2.1. Affected by this vulnerability is the function do_directory of the file cramfsck.c of the component Directory Handler. Performing a manipulation results in path traversal. This vulnerability is identified as CVE-2026-8274. The attack is only possible with local access. Additionally, an exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in npitre cramfs-tools up to 2.1. It has been classified as critical. This affects the function do_directory of the file cramfsck.c of the component Directory Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-8274. The exploitability is told to be easy. Attacking locally is a requirement. Technical details and a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Upgrading to version 2.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2fc492747115b24d8a07eddd27a2d45229cb273c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-29032). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• npitre

Name

• cramfs-tools

Version

• 2.0
• 2.1

License

• open-source

Website

• Product: https://github.com/npitre/cramfs-tools/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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Submitinfo

Accepted

• Submit #810864: GNU cramfs-tools V2.1 Improper Limitation of a Pathname to a Restricted Directory (by nich0las)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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