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CVE-2026-35352 — Vulnerability in coreutils — CVE Details

HIGH

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

Published April 22, 2026Updated September 10, 2026Source: osv

Summary

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.

Advisory Timeline

  • First published April 22, 2026 (173 days ago).
  • Last revised September 10, 2026 — 140 days after initial publication.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
coreutils
crates.io
All versionsRange-based data available

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.0 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-35352?
uutils coreutils has a Time-of-Check to Time-of-Use (TOCTOU) race condition This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.0/10).
How do I check if my project is affected by CVE-2026-35352?
CVE-2026-35352 affects coreutils. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-35352 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.0

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-9gh9-hwpr-rvqq

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