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TI-2026-27477 Aliases CVE-2026-35339GHSA-4x34-chg5-mwjj

uutils coreutils chmod False Success Exit Code in Recursive Mode

Priority LOW 24CWE-253Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

The recursive mode (-R) of the chmod utility in uutils coreutils incorrectly handles exit codes when processing multiple files. The final return value is determined solely by the success or failure of the last file processed. This allows the command to return an exit code of 0 (success) even if errors were encountered on previous files, such as 'Operation not permitted'. Scripts relying on these exit codes may proceed under a false sense of success while sensitive files remain with restrictive or incorrect permissions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00143 3rd percentileScored 2026-11-07
Fix Fixed coreutils (Uutils): 0.6.0uu_chmod (crates.io): 0.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Uutilscoreutilsbefore 0.6.00.6.0Patch availableCNA
—uu_chmod (crates.io)before 0.6.00.6.0Patch availableGHSA-4x34-chg5-mwjj
  • coreutils VendorUutils Affected before 0.6.0 Fixed in 0.6.0 Patch available CNA
  • uu_chmod (crates.io) Vendor— Affected before 0.6.0 Fixed in 0.6.0 Patch available GHSA-4x34-chg5-mwjj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*before 0.6.0VulnerableUutils
  • cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:* Versions before 0.6.0 Vulnerable ·Uutils

Remediation

  • Fix · CNA coreutils (Uutils) Fixed in 0.6.0
  • Fix · GHSA-4x34-chg5-mwjj uu_chmod (crates.io) Fixed in 0.6.0 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Uutils coreutils — github.com/uutils/coreutils/releases/tag/0.6.0

    12 records Highest priority Priority MEDIUM 3 MEDIUM, 9 LOW

    Other records, highest priority first

    • TI-2026-27493 uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU RacePriority MEDIUM 61
    • TI-2026-27504 uutils coreutils printenv Security Inspection Bypass via UTF-8 EnforcementPriority MEDIUM 54
    • TI-2026-27484 uutils coreutils comm Silent Data Corruption via Lossy UTF-8 NormalizationPriority MEDIUM 49
    Show all 12 records → Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35339
  2. 2026-10-03 Alias added: GHSA-4x34-chg5-mwjj

References

Patch 1

Advisory 2

Other 3

  • TI-2026-27506 uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection CVSS 3.1HIGH 7.2
  • TI-2026-27498 uutils coreutils touch Arbitrary File Truncation via TOCTOU Race Condition CVSS 3.1MEDIUM 6.3
  • TI-2026-27488 uutils coreutils cp Unexpected Privileged Executable Creation with -p CVSS 3.1MEDIUM 6.6
  • TI-2026-27502 uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition CVSS 3.1MEDIUM 6.3
  • TI-2026-27493 uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race CVSS 3.1MEDIUM 6.3
  • TI-2026-27511 uutils coreutils ln Local Denial of Service via Improper Handling of Non-UTF-8 Filenames CVSS 3.1MEDIUM 5.5
See all 43 →

Sources

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