Oracle is patching large number of products and this is important to not leave out of the patching implementation process.

http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html

Oracle Critical Patch Update Advisory – April 2016 — A Critical Patch Update is a collection of patches for multiple security vulnerabilities. Critical Patch Update patches are usually cumulative, but each advisory describes only the security fixes added since the previous Critical Patch Update advisory. Thus, prior Critical Patch Update advisories should be reviewed for information regarding earlier published security fixes

Critical Patch Update Schedule – Critical Patch Updates are released on the Tuesday closest to the 17th day of January, April, July and October. The next four dates are:

* 19 July 2016
* 18 October 2016
* 17 January 2017
* 18 April 2017