Software gets patched everyday. Some of these updates fix security problems that were identified by the developers. When these patches become available it is important that they are applied to your system as soon as possible. One of the easier ways to manage updates for your system is using
yum. A special plugin is available to allow only security updates to be installed while ignoring bugfixes and enhancements. This plugin is explained better at
Section 8.1, “YUM Plugin”.