On the Secunia site today, there's a new advisory posted for users of Red Hat linux - an update to the system's PHP packages.

Red Hat has issued an update for php. This fixes some vulnerabilities, which can be exploited by malicious, local users to bypass certain security restrictions and by malicious people to bypass certain security restrictions and cause a DoS (Denial of Service).

The original advisory has more details on what the patch fixes and the checksum information for the update packages for all OSes.