Maintenance on redis on Linux hosting cluster

This night an emergency maintenance will be performed on redis instances on the linux hosting platform. During this maintenance, all redis instances will be restarted after a security update. We expect the interruption to be very short. Note that after the restart, any caches will have to be rebuilt.

The security update includes a fix for the recently published CVE-2025-49844. Due to the way the redis instances are executed on the platform, the impact is already greatly reduced. Nevertheless, this upgrade should still be implemented as soon as possible.