Check for Minimum Java Version

5.3 Check for Minimum Java Version

There is a minimum update level of Java SE (JDK/JRE) requirement before installing the WLS PSU packaged in this SPB.

Fixes for deserialization vulnerabilities are made in the WebLogic Server PSU that depend on JEP 290 filtering and features within newer JDK updates. These fixes for deserialization vulnerabilities are not effective without these JDK updates. Users applying this WLS PSU without these JDK updates will receive warnings in the WebLogic Server console and in WebLogic Server logs.

For details, refer to the document Doc ID 2421487.1 Restricting Incoming Serialized Java Objects to Oracle WebLogic Server.

Refer to the following table for minimum and recommended Java SE versions:

Platform	JDK Vendor	Major JDK Version	Expected Minimum Version	Latest Recommended Version
Windows 64	Oracle	17, 21	17.0.12, 21.0.4	JDK 17.0.14 Oracle JDK 21.0.6
Linux X86-64	Oracle	17, 21	17.0.12, 21.0.4	JDK 17.0.14 Oracle JDK 21.0.6

Refer the following document to verify and upgrade to relevant JDK:

Doc ID 1492980.1 on How to Install and Maintain the Java SE Installed or Used with FMW 11g/12c/14c Products.