CVE-2026-35355

MEDIUM6.3EPSS 0.01%

uutils coreutils has a Time-of-Check to Time-of-Use (TOCTOU) race condition

Published: 4/22/2026Modified: 5/5/2026
Also known as:GHSA-v24v-f45g-w7jfDEBIAN-CVE-2026-35355

Description

The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.

Affected packages (2)

CVSS scores

SourceVersionSeverityVector
osvCVSS 3.1MEDIUM6.3CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

References (6)