Multiple Locks of a Critical Resource
The software locks a critical resource more times than intended, leading to an unexpected state in the system.
When software is operating in a concurrent environment and repeatedly locks a critical resource, the consequences will vary based on the type of lock, the lock's implementation, and the resource being protected. In some situations such as with semaphores, the resources are pooled and extra locking calls will reduce the size of the total available pool, possibly leading to degraded performance or a denial of service. If this can be triggered by an attacker, it will be similar to an unrestricted lock (CWE-412). In the context of a binary lock, it is likely that any duplicate locking attempts will never succeed since the lock is already held and progress may not be possible.
This category identifies Software Fault Patterns (SFPs) within the Multiple Locks/Unlocks cluster (SFP21).
Weaknesses in this category are related to improper handling of locks that are used to control access to resources.
This view (slice) covers all the elements in CWE.
This view (slice) lists weaknesses that can be introduced during implementation.
This view (slice) lists weaknesses that can be introduced during design.