Normally, we don't do major version changes in stable Fedora releases, but because of several CVE's against 5.1.12, we are in the process of releasing KiCad 6.0.2 into Fedora 34 and 35.
Right now, the new builds for F34 and F35 are in the "testing" stage; here are links to the relevant bodhi pages:
I've set the karma requirements to "1", so if anyone using Fedora 34 or 35 is willing to test and up-vote, then we can distribute the new versions quickly. If not, they should be distributed after a 7 day delay.
While it is discouraged, if you want/need to stay on 5.1.12, you can edit /etc/dnf/dnf.conf and add the following line at the end of the file:
exclude=kicad*
That will prevent all further updates to KiCad - you will remain on 5.1.12 until you remove that line again.
Thanks,
Steve