CVE-2026-35364
Publication date 22 April 2026
Last updated 11 November 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| rust-coreutils | 26.10 stonking |
Fixed in 0.9.0-2ubuntu1
|
| 26.04 LTS resolute |
Fixed in 0.10.0-1ubuntu2~26.04.1
|
|
| 24.04 LTS noble |
Vulnerable
|
|
| 22.04 LTS jammy | Not in release |
Notes
john-breton
Fixed upstream in 0.9.0 by 54877ac4, which makes mv's cross-device fallback create the destination with O_NOFOLLOW instead of fs::copy. 44307945 (PR #12468, 0.10.0) only adds the regression test for issue #10015. Fixed in 0.10.0-1ubuntu2~26.04.1 in resolute-updates (LP: #2166202), but not yet in the -security pocket.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.3 · Medium
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-9041-1
- uutils coreutils vulnerabilities
- 11 November 2026