Vulnerability · Published Apr 22, 2026 · Assigned by canonical
CVE-2026-35364uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition
Medium 6.3
In plain English
A medium-severity security flaw in coreutils from Uutils. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35364 |
| Debian:13 | rust-coreutils | no fix listed | DEBIAN-CVE-2026-35364 |
| Debian:14 | rust-coreutils | 0.9.0-1 | DEBIAN-CVE-2026-35364 |
| Ubuntu:24.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35364 |
| Ubuntu:25.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35364 |
| Ubuntu:26.04:LTS | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35364 |
| Ubuntu:26.10 | rust-coreutils | no fix listed | UBUNTU-CVE-2026-35364 |
Affected products (as reported)
Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
References
- https://github.com/uutils/coreutils/issues/10015 issue-tracking