BusyBox cpio path traversal

Summaryinfo

A vulnerability, which was classified as problematic, was found in BusyBox. The impacted element is an unknown function of the component cpio. Such manipulation leads to path traversal. This vulnerability is traded as CVE-2026-124744. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in BusyBox (affected version not known) and classified as problematic. Affected by this issue is some unknown functionality of the component cpio. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A flaw was found in BusyBox. When extracting files using the cpio utility with path traversal protection enabled, hardlink target paths are not properly sanitized. By tricking a user or automated process into extracting a crafted archive, an attacker can create hardlinks that point to files outside the intended extraction directory. This issue may allow an attacker to modify or overwrite arbitrary files outside the target directory during subsequent extraction operations.

The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2026-124744 since 11/09/2026. The exploitation is known to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• BusyBox

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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