PatchTheCVECVE-2026-35355: The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race conditio
CVE-2026-35355 is a medium-severity flaw (CVSS 6.3) affecting coreutils. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 overwri
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.3 (Medium) |
| Attack vector | Local |
| Attack complexity | High |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.1% (top 98%) |
| CISA exploited list | No |
| Weakness | CWE-367 |
| Published | 2026-04-22 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-35355?
coreutils: upgrade to 0.6.0. Exact commands for each OS are on this page.
Is CVE-2026-35355 being exploited?
CVE-2026-35355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-35355 affect?
CVE-2026-35355 affects coreutils. Severity is medium (CVSS 6.3). 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 opera
How urgent is CVE-2026-35355?
Priority 27/100. Public exploit reference
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