Oracle has released the 25 Oracle Java 7 Update (7U25), which comes with more than 40 security updates and bugfixes. As you may know, Oracle Java has nothing to do with OpenJDK.
Updating the Oracle Java 7 from your system is easy, because the webupd8 team has added it in their PPA. So, all you have to do is:
$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java7-installer
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