{"id":"CVE-2026-35365","aliases":["GHSA-h444-6j9x-p8vh"],"url":"https://o3.security/vulnerability/CVE-2026-35365","summary":"uutils coreutils mv Denial of Service and Data Duplication via Improper Symlink Expansion","details":"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.\n\n**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.\n\n**Remediation:** Acknowledged by Canonical; fixed in commit 9654e4ab.\n\n---\n_Reported by Zellic in the *uutils coreutils Program Security Assessment* (prepared for Canonical, Jan 20 2026), audited commit `3a07ffc5a9bd4c283e75afa548ba1f1957bad242`. Finding 3.63. Credit: Zellic._","published":"2026-04-22T16:08:41.136Z","modified":"2026-08-12T03:51:12.416482729Z","cvss":{"score":6.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L"},"epss":{"score":0.00161,"percentile":0.05699,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"uu_mv","fixedVersion":"0.7.0"}],"fix":{"url":"https://github.com/uutils/coreutils/pull/10546","label":"uutils/coreutils#10546"},"references":[{"type":"WEB","url":"https://github.com/uutils"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35365.json"},{"type":"ADVISORY","url":"https://github.com/uutils/coreutils/releases/tag/0.7.0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35365"},{"type":"FIX","url":"https://github.com/uutils/coreutils/pull/10546"},{"type":"PACKAGE","url":"https://github.com/uutils/coreutils"},{"type":"WEB","url":"https://github.com/uutils/coreutils/security/advisories/GHSA-h444-6j9x-p8vh"},{"type":"WEB","url":"https://github.com/uutils/coreutils/commit/9654e4abaf24449ef2279e9a16963edb5c8b8fef"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.416482729Z"}}