VULNERABILITY INTELLIGENCE

CVE-2026-35355

CVSS score6.3 MEDIUM
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-04-22
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

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.

Weakness classification

  • CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

Primary references