filelock: SoftFileLock removes a live holder's marker when another user forges the PID in a writable marker

影響: pip:filelock >= 3.22.0, <= 4.2.0 → 4.2.1

SoftFileLock, MarkerSoftFileLock, SoftFileLease, their async variants and a FileLock that has fallen back to a soft lock on ENOSYS decide from the record inside the marker file whether its owner is gone. The marker is the file whose presence says a process holds the lock. They do not check who could have written that record. A local user who can write the marker but cannot remove it rewrites the holder's record to name a dead PID (process id). That position arises with an explicit mode with gro…

GitHub Advisory Databaseで読む

2026/10/29 06:08、GitHub Advisory Databaseが「filelock: SoftFileLock removes a live holder's marker when another user forges the PID in a writable marker」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「警告」(medium) です。関連する技術: Python。CVE: CVE-2026-112939。