Due to a recently revealed security vulnerability a large portion of RackSpace Cloud servers must be rebooted in the next 24 hours. Servers that are not proactively rebooted by the customers will be rebooted automatically by RackSpace. Here’s the RackSpace community page with details:
Reliable Penguin will be proactively rebooting customer servers in advance of the forced reboots over the next 24 hours. When possible we will notify clients before the reboots but due to the critical nature of this issue and limited time frame we will proceed even if notification is not possible.
Please contact firstname.lastname@example.org if you have questions or concerns.