From Oracle Support:
The Oracle Java SE and Java for Business Critical Patch Update February 2011 was released on February 15th, 2011. Oracle strongly recommends applying the patches as soon as possible.
The Critical Patch Update Advisory is the starting point for relevant information. It includes the list of products affected, a summary of the security vulnerabilities, and a pointer to obtain the latest releases and patches. Supported products that are not listed in the “Supported Products Affected” section of the advisory do not require new patches to be applied.
Also, it is essential to review the Critical Patch Update supporting documentation referenced in the Advisory before applying patches, as this is where you can find important pertinent information.
The Advisory is available at the following location:
Oracle Critical Patch Updates and Security Alerts:
http://www.oracle.com/technetwork/topics/security/alerts-086861.html
Oracle Java SE and Java for Business Critical Patch Update February 2011:
http://www.oracle.com/technetwork/topics/security/javacpufeb2011-304611.html