Bug 2556198 (CVE-2026-112909) - CVE-2026-112909 filelock: filelock: arbitrary file truncation via lock path replacement
Summary: CVE-2026-112909 filelock: filelock: arbitrary file truncation via lock path r...
Keywords:
Status: NEW
Alias: CVE-2026-112909
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 14:33 UTC by OSIDB Bzimport
Modified: 2026-11-03 08:30 UTC (History)
89 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-10-20 14:33:19 UTC 
filelock is a platform-independent file lock for Python. Prior to 4.2.1, UnixFileLock can truncate a regular file renamed onto the lock path when another local user has actual rename permission, or hard-linked there under a permissive hard-link policy; when an explicit mode is requested, affected versions from 3.10.2 can also change that file's mode. This issue is fixed in version 4.2.1.
Note You need to log in before you can comment on or make changes to this bug.