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Vulnerability · Published Apr 22, 2026 · Assigned by canonical

CVE-2026-35360uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition

Medium 6.3

In plain English

A medium-severity security flaw in coreutils from Uutils. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.1%top 99.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

The touch utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file creation. When the utility identifies a missing path, it later attempts creation using File::create(), which internally uses O_TRUNC. An attacker can exploit this window to create a file or swap a symlink at the target path, causing touch to truncate an existing file and leading to permanent data loss.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12rust-coreutilsno fix listedDEBIAN-CVE-2026-35360
Debian:13rust-coreutilsno fix listedDEBIAN-CVE-2026-35360
Debian:14rust-coreutils0.10.0-1DEBIAN-CVE-2026-35360
Ubuntu:24.04:LTSrust-coreutilsno fix listedUBUNTU-CVE-2026-35360
Ubuntu:25.10rust-coreutilsno fix listedUBUNTU-CVE-2026-35360
Ubuntu:26.04:LTSrust-coreutilsno fix listedUBUNTU-CVE-2026-35360
Ubuntu:26.10rust-coreutilsno fix listedUBUNTU-CVE-2026-35360

Affected products (as reported)

VendorProductVersions
Uutils coreutils see references

Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

References