Hello Java customers!We are happy to announce the latest July 2026 patch & security update release for the Microsoft Build of OpenJDK. Check our release notes page for details on fixes and enhancements or download and install the binaries today. The source code of our builds are now available on GitHub for further inspection: OpenJDK 25.0.4 OpenJDK 21.0.12 OpenJDK 17.0.20 OpenJDK 11.0.32Microsoft Build of OpenJDK specific updatesOpenJDK 25 Used the "Processor Information" counter to enumerate processors in all processor groups Added optimized aarch64_get_thread_helper() for Windows/ARM64 Marked Reserved Stack Area as unsupported on Windows/ARM64OpenJDK 21 Used the "Processor Information" counter to enumerate processors in all processor groups Marked Reserved Stack Area as unsupported on Windows/ARM64OpenJDK 17 Used the "Processor Information" counter to enumerate processors in all processor groups Marked Reserved Stack Area as unsupported on Windows/ARM64OpenJDK 11 Used the "Processor Information" counter to enumerate processors in all processor groups Marked Reserved Stack Area as unsupported on Windows/ARM64Summary of Upstream UpdatesOpenJDK Vulnerability Advisory July 2026OpenJDK 25 List of fixes For further details, please refer to Oracle's page on JDK25 consolidated release notes.OpenJDK 21 List of fixes For further details, please refer to Oracle's page on JDK21 consolidated release notes.OpenJDK 17 List of fixes For further details, please refer to Oracle's page on JDK17 consolidated release notes.OpenJDK 11 List of fixes For further details, please refer to Oracle's page on JDK11 consolidated release notes.OpenJDK 8We continue to provide support on Azure and internally at Microsoft for OpenJDK 8 binaries of Eclipse Temurin built by the Eclipse Adoptium project. To facilitate its usage, we ship container images of OpenJDK 8 on top of Azure Linux and Ubuntu. Refer to our documentation. Download the latest Temurin build of OpenJDK 8Questions?Contact openjdk-support@microsoft.com.Amplify the news!LinkedIn: LinkedIn post from Java at Microsoft