Support for Software Patches and Upgrades
Due to the ongoing nature of software improvement, vendors will issue patches and service packs for the operating systems, application servers and database servers on top of specific versions that the application has been tested with.
If it is necessary to apply an upgrade, please do so in a test environment that is running on the same platform as your production environment prior to updating the production environment.
Always contact Oracle Support prior to applying vendor updates that do not guarantee backward compatibility.