[CentOS] 7.2 kernel panic on boot

I wanted to help you by making sure that you were on the most recent
version, but, looking at the Centos.org website I was unable to figure
out if 7.2 was the tip. 7.1503? Is that 7.2? Beats me.

https://wiki.centos.org/Download appears to say that 1503 is the
current version.

I *thought* this wacky CentOS version number would be more like
7.1.1503? Did I miss something? Is there no easy mapping from RHEL to
CentOS? Didn't I bring this up when the wacky version numbers were
suggested? Why am I sending this email?