What is the meaning of Critical Patch Update?

A Critical Patch Update (CPU) is a scheduled release of software patches and updates aimed at addressing security vulnerabilities and other critical issues in software systems, particularly in Oracle products. These updates are essential for maintaining system integrity, performance, and security. CPUs typically include fixes for multiple vulnerabilities and are released quarterly, helping organizations to protect their systems from potential threats. Regular application of these updates is crucial for safeguarding against exploits and ensuring compliance with security standards.