CVE-2026-35355 (GCVE-0-2026-35355)
Vulnerability from cvelistv5 – Published: 2026-04-22 16:08 – Updated: 2026-04-22 18:01
VLAI?
Title
uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race
Summary
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.
Severity ?
6.3 (Medium)
CWE
- CWE-367 - Time-of-Check Time-of-Use (TOCTOU) Race Condition
Assigner
References
| URL | Tags | |||||||
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Credits
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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