As many learned today, there's been a rather critical bug living within the Linux kernel for several years (as possibly far back as the original Linux 2.6 kernel release) that was finally fixed and this "high priority" bug is now publicly detailed. This issue (CVE-2010-2240), which allows arbitrary code to be executed as root, is easily exploitable by most current Linux desktops via simply running any compromised GUI application that has access to the running X.Org Server.