High cpu usage after ES update to 7.17.7

Search Guard FLX does not require any new licenses.

For a quick fix, we need to check a couple of things - so it would be only medium quick. But we will try to come back to you ASAP.

Just a quick checkup: Are you having any index privileges set for aliases? (if you have an alias A for indices I1, I2, I3, do you define the privileges for A or for I*?)