PT-2026-34488 · Unknown · Uutils Coreutils

Zellic · Published 2026-04-22 · Updated 2026-04-22 · CVE-2026-35352

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions uutils coreutils (affected versions not specified)

Description A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility. This occurs when the utility creates a FIFO and subsequently performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can replace the newly created FIFO with a symbolic link between these two operations, redirecting the chmod call to an arbitrary file. This may lead to privilege escalation if the utility is executed with elevated privileges. TOCTOU is a software bug where a system checks the state of a resource before using it, but the state changes between the check and the use.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2026-35352

Affected Products

Uutils Coreutils

References · 3

• 🔥 https://github.com/uutils/coreutils/issues/10020 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-35352 · Security Note
• https://twitter.com/CVEnew/status/2047012102938968277 · Twitter Post