CVE-2026-35365Medium· 6.6▾ Sunlitmv: symlinks expanded during cross-device move (resource exhaustion / data duplication)
▾ Sunlit zone — Low / medium · no exploitation signal
impact 36.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.2%
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.
uu_mv < 0.7.0Upgrade to a patched release:
uu_mv 0.7.0Connected by shared product, vendor, weakness, or advisory.
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