Bug 2556212 (CVE-2026-112935) - CVE-2026-112935 filelock: filelock: Unauthorized concurrent access via stale lock cleanup race condition
Summary: CVE-2026-112935 filelock: filelock: Unauthorized concurrent access via stale ...
Keywords:
Status: NEW
Alias: CVE-2026-112935
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 14:44 UTC by OSIDB Bzimport
Modified: 2026-11-03 08:29 UTC (History)
89 users (show)

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Description OSIDB Bzimport 2026-10-20 14:44:58 UTC 
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.
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