Vulnerability · Published Apr 22, 2026 · Assigned by canonical
CVE-2026-35353uutils coreutils mkdir Permission Exposure Race Condition with -m
Low 3.3
In plain English
A low-severity security flaw in coreutils from Uutils. There are no confirmed reports of exploitation so far. 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.
Official description
The mkdir utility in uutils coreutils incorrectly applies permissions when using the -m flag by creating a directory with umask-derived permissions (typically 0755) before subsequently changing them to the requested mode via a separate chmod system call. In multi-user environments, this introduces a brief window where a directory intended to be private is accessible to other users, potentially leading to unauthorized data access.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35353 |
| Debian:13 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35353 |
| Debian:14 | rust-coreutils | 0.6.0-1 | DEBIAN-CVE-2026-35353 |
| Ubuntu:24.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35353 |
| Ubuntu:25.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35353 |
Affected products (as reported)
Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/uutils/coreutils/pull/10036 issue-tracking, patch
- https://github.com/uutils/coreutils/releases/tag/0.6.0 vendor-advisory