As mentioned in this Secunia advisory today, rPath has release updates to several packages today including a few PHP ones and GD library updates.

rPath has issued an update for gd and multiple php packages. This fixes some vulnerabilities, where some have an unknown impact and others can potentially be exploited to cause a DoS (Denial of Service).

The update is marked as "moderately critical" so it's recommended that users update their installations as soon as possible. You can find out more information and get the links to download the packages from the original advisory post.