Cyber Resilience

CVE-2026-35353

Race Condition in Uutils Coreutils ≤ 0.6.0

Race Condition
Published
22 April 2026
Modified
27 April 2026
Patch / advisory
View advisory
CVSS Score v3.1 3.3
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS Score 0.0010 1th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2026-35353 is a low-severity Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367) vulnerability in Uutils Coreutils. Its CVSS base score is 3.3 (Low).

Operationally, ranked at the 1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and SI-2 (Flaw Remediation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

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,…

more

this introduces a brief window where a directory intended to be private is accessible to other users, potentially leading to unauthorized data access.

CWE(s)
CWE-367

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

Insufficient information to map techniques.
Confidence: LOW · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-35352Same product: Uutils Coreutils
CVE-2026-35356Same product: Uutils Coreutils
CVE-2026-35362Same product: Uutils Coreutils
CVE-2026-35355Same product: Uutils Coreutils
CVE-2026-35360Same product: Uutils Coreutils
CVE-2026-35359Same product: Uutils Coreutils
CVE-2026-35340Same product: Uutils Coreutils
CVE-2026-35367Same product: Uutils Coreutils
CVE-2026-35369Same product: Uutils Coreutils
CVE-2026-35358Same product: Uutils Coreutils

Affected Assets

uutils
coreutils
≤ 0.6.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • AC-3 Access Enforcement
  • AC-6 Least Privilege
  • SI-2 Flaw Remediation
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V15.4.2
  • V17.2.6

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match
prevent

Directly enforces correct directory permissions at creation time, eliminating the TOCTOU window where umask-derived modes allow unauthorized access.

AC-6 Least Privilege partial match
prevent

Restricts the set of users who can traverse or access the newly created directory during the brief interval before the explicit chmod completes.

SI-2 Flaw Remediation good match
prevent

Requires prompt patching of the uutils mkdir implementation so that the requested mode is applied atomically rather than via a subsequent chmod.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly include coding standards and reviews that prevent TOCTOU race conditions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.17 Clock synchronization none match
none

Reliable, synchronized time across systems narrows the exploitable window in which a resource state can change between a security check and its use.

References