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