There is this view that RedHat is somehow doing something so indispensable; but really they are curating a collection of software, written wholly and completely by other people and released under GPL2 or similar licenses.
That somehow this gives them the ability to supercede the licenses that Red Hat, themselves, agreed to when downloading, compiling and distributing the Linux kernel and related software... just seems ridiculous.
So many are commenting, but forgetting that the full measure of legality is seen in courtrooms. It's unlikely that a successful defense in court can be mounted due to IBM's deep pockets, if we are realistic about it.
My hope is that Red Hat gets the full 'Bud Light' treatment instead, and simply ceases to be much of a force in the marketplace.
EDIT to add, here is the actual text of GPL v2 license... https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html