The Critical Patch Update (CPU) for April 2018 was released on April 17, 2018. Oracle strongly recommends applying the patches as soon as possible.
The Critical Patch Update Advisory is the starting point for relevant information. It includes a list of products affected, pointers to obtain the patches, a summary of the security vulnerabilities, and links to other important documents.
Supported products that are not listed in the "Supported Products and Components Affected" Section of the advisory do not require new patches to be applied.
The Critical Patch Update Advisory is available at the following location:
It is essential to review the Critical Patch Update supporting documentation referenced in the Advisory before applying patches.