The Java Virtual Machine (JVM) is the runtime environment that executes Java bytecode. It provides a consistent execution layer across supported operating systems and manages tasks such as memory allocation, garbage collection, and access to system resources. Java applications typically run within a JVM process.
In cybersecurity, the JVM matters because protections can monitor or influence application behavior at runtime, including requests, code execution, and access to sensitive data. JVM-focused virtual patching can apply rules that block or reduce exposure to certain attacks while developers prepare and test a permanent fix. Defenders should assess compatibility with their Java versions, deployment model, and application workload, since runtime controls can affect performance or generate false positives.