Over the course of today and yesterday we updated all DigitalOcean Hypernodes to the 4.4.0-109 kernel with the Meltdown fix. There are still some nodes that haven’t been rebooted into the new kernel because we could not create a preventive backup or because of other issues. Owners of these machines will be contacted with further information.
For more information about Meltdown and Spectre see this hypernode.nl blog post.