CWE-1096 - Singleton Class Instance Creation without Proper Locking or Synchronization

CWE ID:

CWE-1096

Abstraction:Variant
Structure:Simple
Status:Incomplete

Release Date:2019-01-03
Latest Modification Date:2023-06-29

Weakness Name

Singleton Class Instance Creation without Proper Locking or Synchronization

Description

The product implements a Singleton design pattern but does not use appropriate locking or other synchronization mechanism to ensure that the singleton class is only instantiated once.

This issue can prevent the product from running reliably, e.g. by making the instantiation process non-thread-safe and introducing deadlock (CWE-833) or livelock conditions. If the relevant code is reachable by an attacker, then this reliability problem might introduce a vulnerability.