Downgrade Redhat Kernel
How to downgrade a Redhat kernel within the same release.
List kernel.
<pre lang="bash">
yum list kernel-3.10.0-862*
yum list kernel-3.10*
Install previous kernel if missing.
<pre lang="bash">
yum install kernel-3.10.0-862.el7
Downgrade to next minor release.
<pre lang="bash">
yum downgrade redhat-release