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.

PUBLISHED Reserved 2026-04-02 | Published 2026-04-22 | Updated 2026-04-22 | Assigner canonical

Problem types

CWE-367: Time-of-Check Time-of-Use (TOCTOU) Race Condition

Product status

Credits

Zellic finder

References

github.com/uutils/coreutils/pull/10036 issue-tracking patch

github.com/uutils/coreutils/releases/tag/0.6.0 vendor-advisory

cve.org (CVE-2026-35353)

nvd.nist.gov (CVE-2026-35353)

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