Read the docs
TI-2026-27496 Aliases CVE-2026-35358GHSA-8vrf-r662-2w2v

uutils coreutils cp Semantic Loss and Potential Denial of Service with -R via Device Node Stream Reading

Priority LOW 24CWE-706Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

The cp utility in uutils coreutils, when performing recursive copies (-R), incorrectly treats character and block device nodes as stream sources rather than preserving them. Because the implementation reads bytes into regular files at the destination instead of using mknod, device semantics are destroyed (e.g., /dev/null becomes a regular file). This behavior can lead to runtime denial of service through disk exhaustion or process hangs when reading from unbounded device nodes.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00178 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed coreutils (Uutils): 0.7.0uu_cp (crates.io): 0.7.0

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 0.7.00.7.0Patch availableCNA
—uu_cp (crates.io)before 0.7.00.7.0Patch availableGHSA-8vrf-r662-2w2v
  • coreutils VendorUutils Affected before 0.7.0 Fixed in 0.7.0 Patch available CNA
  • uu_cp (crates.io) Vendor— Affected before 0.7.0 Fixed in 0.7.0 Patch available GHSA-8vrf-r662-2w2v

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:*before 0.7.0VulnerableUutils
  • cpe:2.3:a:uutils:coreutils:*:*:*:*:*:rust:*:* Versions before 0.7.0 Vulnerable ·Uutils

Remediation

  • Fix · CNA coreutils (Uutils) Fixed in 0.7.0
  • Fix · GHSA-8vrf-r662-2w2v uu_cp (crates.io) Fixed in 0.7.0 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/0.7.0

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-27487 uutils coreutils Path-Based Safety Bypass with --preserve-rootPriority LOW 33
    • TI-2026-27503 uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink ExpansionPriority LOW 28
    • TI-2026-27494 uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink RacePriority LOW 27
    Show all 5 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-2026-35358
  2. 2026-10-03 Alias added: GHSA-8vrf-r662-2w2v

References

Exploit 1

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

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