kpatch is a solution that allows you to patch a running kernel without rebooting your system with a new kernel with desired patches.

For more information about kpatch and how it works in Red Hat Enterprise Linux 7 see Working with kpatch in the Kernel administration guide.

For more information about kpatch and how to use it to apply kernel patches in Red Hat Enterprise Linux 8 see Applying kernel patches with kpatch in Managing, monitoring and updating the kernel.