filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout

影響: pip:filelock >= 3.20.4, <= 4.2.0 → 4.2.1

ReadWriteLock and AsyncReadWriteLock (the SQLite-backed reader/writer lock) run PRAGMA journal_mode=MEMORY on a fresh connection for every acquire. That statement makes SQLite load the whole schema (the sqlite_master table, which lists every table and index with its CREATE text) of whatever file sits at the lock path. The caller's timeout reaches SQLite only as busy_timeout, which bounds waits for another connection's lock, not schema loading. The only content checks reject non-regular files an…

GitHub Advisory Databaseで読む

2026/10/29 06:08、GitHub Advisory Databaseが「filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout」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、SQLite。CVE: CVE-2026-112915。