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CWE - 367 : Time-of-check Time-of-use (TOCTOU) Race Condition

CWE Definition http://cwe.mitre.org/data/definitions/367.html
Number of vulnerabilities: 84
Description The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state.This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multi-threaded programs.
Background Details
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