Glossary: Physical and Wireless Vectors, and Vulnerabilities

TOCTOU (time-of-check to time-of-use)

Also written: TOC, TOU, time-of-check, time-of-use, CWE-367

A race condition where something changes between the moment a program checks it (TOC) and the moment it uses it (TOU), so the check is out of date. Make check and use one atomic step to fix it.