CVE-2026-35353

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-35353
• https://github.com/uutils/coreutils/pull/10036
• https://github.com/uutils/coreutils/commit/037b9583bc03d814e8516df54ebcda6f681fe1f8
• https://github.com/uutils/coreutils
• https://github.com/uutils/coreutils/releases/tag/0.6.0
• https://security-tracker.debian.org/tracker/CVE-2026-35353
• https://github.com/advisories/GHSA-vf87-345h-9qhx