6.3
CVE-2026-35355
- EPSS 0.12%
- Veröffentlicht 22.04.2026 16:08:14
- Zuletzt bearbeitet 27.04.2026 12:27:34
- Quelle security@ubuntu.com
- CVE-Watchlists
- Unerledigt
Loginuutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race
The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.12% | 0.02 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| security@ubuntu.com | 6.3 | 1 | 5.2 |
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
|
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.
https://github.com/uutils/coreutils/releases/tag/0.6.0
https://github.com/uutils/coreutils/pull/10067