[rwmj]

The priority fields are set by developers so they know which bugs they should work on first. The two bugs of mine which appear on that list are both new features for RHEL 7.2. I set the priority of those so I know to work on them first. I really think you need a better query than that one.

Update: I think if you wanted to find out which critical bugs affected RHEL 7.0 on release, you'd probably want to look at the list of z-stream packages (RHEL 7.0.z) which subscribers have access to. These are bugs which didn't affect the installer or first boot, but were important enough to need fixing in RHEL 7.0 after it went out. (If a bug was critical enough to affect installation or first boot, it would have delayed the release).