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TI-2026-27516 Aliases CVE-2026-35378GHSA-5pv5-xh52-hvrp

uutils coreutils expr Local Denial of Service via Eager Evaluation of Parenthesized Subexpressions

Priority MEDIUM 49CWE-768Published · Updated

Key facts

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

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

Summary

A logic error in the expr utility of uutils coreutils causes the program to evaluate parenthesized subexpressions during the parsing phase rather than at the execution phase. This implementation flaw prevents the utility from performing proper short-circuiting for logical OR (|) and AND (&) operations. As a result, arithmetic errors (such as division by zero) occurring within "dead" branches, branches that should be ignored due to short-circuiting, are raised as fatal errors. This divergence from GNU expr behavior can cause guarded expressions within shell scripts to fail with hard errors instead of returning expected boolean results, leading to premature script termination and breaking GNU-compatible shell control flow.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00156 4th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed coreutils (Uutils): 0.8.0coreutils (crates.io): 0.8.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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 0.8.00.8.0Patch availableCNA
—coreutils (crates.io)before 0.8.00.8.0Patch availableGHSA-5pv5-xh52-hvrp
  • coreutils VendorUutils Affected before 0.8.0 Fixed in 0.8.0 Patch available CNA
  • coreutils (crates.io) Vendor— Affected before 0.8.0 Fixed in 0.8.0 Patch available GHSA-5pv5-xh52-hvrp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*before 0.8.0VulnerableUutils
  • cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:* Versions before 0.8.0 Vulnerable ·Uutils

Remediation

  • Fix · CNA coreutils (Uutils) Fixed in 0.8.0
  • Fix · GHSA-5pv5-xh52-hvrp coreutils (crates.io) Fixed in 0.8.0 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/0.8.0

    7 records Highest priority Priority MEDIUM 3 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-27517 uutils coreutils tr Local Logic Error and Data Integrity Issue in Character Class HandlingPriority MEDIUM 49
    • TI-2026-27513 uutils coreutils split Local Data Integrity Issue via Lossy Filename EncodingPriority MEDIUM 49
    • TI-2026-27514 uutils coreutils chcon Security Bypass and Mandatory Access Control (MAC) Inconsistency via TOCTOU Race ConditionPriority LOW 25
    Show all 7 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-2026-35378
  2. 2026-10-03 Alias added: GHSA-5pv5-xh52-hvrp

References

Exploit 1

Advisory 2

Other 2

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences