Quick update: Oracle has released Java 7 Update 25 and the new version is available in the WebUpd8 Oracle Java PPA, for Ubuntu and Debian users.
Oracle Java 7 Update 25 (7u25) comes with fixes for 40 security vulnerabilities, along with other non-security fixes. Since JDK 6 hasn't been updated with the latest security patches, if you're still using it, it's recommended you upgrade to JDK 7.
To install the latest Oracle JDK7 (7u25) in Ubuntu and derivatives (Linux Mint, etc.), use the following commands:
sudo add-apt-repository ppa:webupd8team/java sudo apt-get update sudo apt-get install oracle-java7-installer
Debian users can find installation instructions HERE.
For more information, see: Install Oracle Java 7 in Ubuntu via PPA Repository.