Uutils coreutils up to 0.7.x Ln Utility symlink

Summaryinfo

A vulnerability classified as critical was found in Uutils coreutils up to 0.7.x. Affected by this issue is some unknown functionality of the component Ln Utility. Such manipulation leads to symlink. This vulnerability is referenced as CVE-2026-35372. The attack can only be performed from a local environment. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Uutils coreutils up to 0.7.x. Affected by this issue is an unknown function of the component Ln Utility. The manipulation with an unknown input leads to a symlink vulnerability. Using CWE to declare the problem leads to CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A logic error in the ln utility of uutils coreutils allows the utility to dereference a symbolic link target even when the --no-dereference (or -n) flag is explicitly provided. The implementation previously only honored the "no-dereference" intent if the --force (overwrite) mode was also enabled. This flaw causes ln to follow a symbolic link that points to a directory and create new links inside that target directory instead of treating the symbolic link itself as the destination. In environments where a privileged user or system script uses ln -n to update a symlink, a local attacker could manipulate existing symbolic links to redirect file creation into sensitive directories, potentially leading to unauthorized file creation or system misconfiguration.

The weakness was published by Zellic. The advisory is available at github.com. This vulnerability is handled as CVE-2026-35372 since 04/02/2026. The exploitation is known to be easy. Local access is required to approach this attack. The technical details are unknown and an exploit is not available.

Upgrading to version 0.8.0 eliminates this vulnerability.

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Productinfo

Vendor

• Uutils

Name

• coreutils

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7

Website

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

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