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CVE-2026-35365 — Vulnerability in uu_mv — CVE Details

MEDIUM

mv: symlinks expanded during cross-device move (resource exhaustion / data duplication)

Published July 6, 2026Updated July 6, 2026Source: osv

Summary

When moving directories across filesystems, uutils `mv` dereferences symlinks inside the tree, copying their targets as real files/dirs instead of preserving the symlinks. GNU preserves symlinks by default. E.g. a `etc_link -> /etc` inside the source becomes a full copy of `/etc` at the destination. **Impact:** (1) resource exhaustion — a small tree can expand into a huge copy (time/disk DoS); (2) unintended duplication of sensitive paths referenced by symlink; (3) symlink-loop amplification causing deep recursion. Recommendation: in cross-device fallback, detect symlinks via `symlink_metadata()` and recreate with `read_link()`/`symlink()`; add loop detection. **Remediation:** Acknowledged by Canonical; fixed in commit 9654e4ab. --- _Reported by Zellic in the *uutils coreutils Program Security Assessment* (prepared for Canonical, Jan 20 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`. Finding 3.63. Credit: Zellic._

Advisory Timeline

  • First published July 6, 2026 (98 days ago).
  • Last revised July 6, 2026 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update uu_mv to 0.7.0 or later
cargo update -p uu_mv --precise 0.7.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
uu_mv
crates.io
All versions0.7.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.6 score means for each attack dimension.

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

References

Frequently Asked Questions

What is CVE-2026-35365?
mv: symlinks expanded during cross-device move (resource exhaustion / data duplication) This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.6/10).
How do I check if my project is affected by CVE-2026-35365?
CVE-2026-35365 affects uu_mv. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-35365 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
6.6

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-h444-6j9x-p8vh

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