CVE-2026-35364
uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition
- State
- Published
- Severity
- 6.3 Medium
- Published
- Apr 22, 2026
- Updated
- Apr 22, 2026
- Reserved
- Apr 2, 2026
Description
A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.3 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H | canonical |
Weaknesses
- CWE-367 Time-of-Check Time-of-Use (TOCTOU) Race Condition
Affected Products
| Product | Versions |
|---|---|
coreutilsUutils |
References
- https://github.com/uutils/coreutils/issues/10015issue-tracking
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