CVE-2026-112935: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition in tox-dev filelock
Description
filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.
CVSS v3.1
Score 4.7medium
Affected software
tox-dev
filelock
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-19T21:30:47.244Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad77f652cdf04f65637ac37
Added to database: 10/20/2026, 14:49:09 UTC
Last updated: 10/20/2026, 14:49:09 UTC
Views: 1
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