Uutils coreutils Mv Utility toctou

Summaryinfo

A vulnerability classified as problematic has been found in Uutils coreutils. Affected by this vulnerability is an unknown functionality of the component Mv Utility. This manipulation causes toctou. The identification of this vulnerability is CVE-2026-35364. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Uutils coreutils (version now known). Affected by this vulnerability is some unknown processing of the component Mv Utility. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect integrity, and availability. The summary by CVE is:

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

The weakness was shared by Zellic. The advisory is shared at github.com. This vulnerability is known as CVE-2026-35364 since 04/02/2026. The exploitation appears to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

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

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Productinfo

Vendor

• Uutils

Name

• coreutils

Website

• Product: https://github.com/uutils/coreutils/

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