CWE-585—Empty Synchronized Block
PUBLISHEDweakness record
released 2006-12-15 · last modified 2025-04-03
Metadata
- CWE ID:
- CWE-585
- Abstraction:
- Variant
- Structure:
- Simple
- Status:
- Draft
- Release Date:
- 2006-12-15
- Latest Modification Date:
- 2025-04-03
Weakness Name
Empty Synchronized Block
Description
The product contains an empty synchronized block.
An empty synchronized block does not actually accomplish any synchronization and may indicate a troubled section of code. An empty synchronized block can occur because code no longer needed within the synchronized block is commented out without removing the synchronized block.
Common Consequences
- Scope:
- Other
- Impact:
- Other
- Notes:
- An empty synchronized block will wait until nobody else is using the synchronizer being specified. While this may be part of the desired behavior, because you haven't protected the subsequent code by placing it inside the synchronized block, nothing is stopping somebody else from modifying whatever it was you were waiting for while you run the subsequent code.