Software update that fixes security vulnerabilities, bugs, or adds functionality.
A patch is a software update released by vendors to fix vulnerabilities, bugs, or security issues. Security patches specifically address known vulnerabilities, often released urgently when exploits appear. Patches may be delivered individually (hotfixes), in scheduled bundles (Patch Tuesday for Microsoft), or continuously. Applying patches (patching) is fundamental to security—many breaches exploit known vulnerabilities with available patches. Patch management balances security urgency with testing requirements to avoid breaking production systems.
Why It Matters
The DSC Perspective:
Patching closes known security holes. Many high-profile breaches exploited vulnerabilities with patches available for months. Timely patching is one of the most effective security controls, but requires discipline and process.