News has been doing the rounds for a little bit about Easy Anti-Cheat (EAC) suddenly not working after system updates for some users, turns out it's an issue with glibc.
Reported on GitHub over a week ago, the issue has been growing as more and more users have been updating their systems. Only certain Linux distributions are affected, mainly those that pull in package updates a lot faster like Arch and derivatives.
In the upstream bug report for glibc there's been plenty of back and forth on it. Hopefully a true resolution will be found. Until then, multiple distributions seem to be readying up an update (Arch looks to have it out now) that reverts the change to get EAC games to work once again. So if you haven't updated recently, it might be an idea to hold off for just a little bit until this situation is sorted.