Virtualization is becoming ubiquitous, from the enterprise datacenter to small businesses that consolidate all of their servers on a single machine. But virtualization software, like any other, can have security vulnerabilities and needs to be kept updated. If you're running VMware ESX/ESXi, be aware of new security updates released today. The advisory notes that this update is to patch a denial of service vulnerability in the Service Location Protocol Daemon (SLPD). The exploit works by overloading the processor.
Patches were also released to update bind, pam and rpm. You can find out more about all of them here: