CVE-2026-35355

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.

Score
CVSS 3.1 6.3 Medium
Status
Analyzed - security@ubuntu.com
Published
2026-04-22
Last modified
2026-10-26
Weaknesses
CWE-367

Affected products

References

 
 
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