CVE-2026-35352

Publication date 22 April 2026

Last updated 10 November 2026

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
rust-coreutils	26.10 stonking	Not affected
	26.04 LTS resolute	Not affected
	25.10 questing	Ignored end of life, was needed
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
rust-coreutils	Upstream: 00f77cc

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.0 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.0 · High
Exploitability score	-
Impact score	-

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