Greetings,
due to a high severity Vulnerability in the User Authentication server, we are doing an out of order upgrade of Cloud Foundry tomorrow. Due to the short announcement window, we will only do reboots of the VMs, compared to the usual recreation, speeding up the update considerably. We do not expect downtimes, nor do we plan to restart the Application Hosts, so apps will not be restart.
Greetings
Sven Schmidt
https://www.cloudfoundry.org/cve-2017-4974/