CVE-2026-35355

Publication date 22 April 2026

Last updated 10 November 2026

Ubuntu priority

Cvss 3 Severity Score

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.

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: b5bbabc

Severity score breakdown

CVSS version: CVSS v3.0

Base score 6.3 · Medium

Base metrics

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

Scores

Parameter	Value
Base score	6.3 · Medium
Exploitability score	-
Impact score	-

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