Attention about the Fedora Magazine article that elaborates this case: The article contained misleading information and still indicates misleading points after its update: If you have any F40 - including Beta - your “testing” branches are enabled by default: this means, any F40 has to be assumed to be affected and thus needs to follow the advice for mitigation below (please read the update 3 below). Communications between development and the magazine unfortunately is broken at the moment. The x...
Using the F40 preview with KDE and a regular update from Discover rolled xz back to the known good version 5.4.6