Canonical Livepatch patches high and critical linux kernel vulnerabilities removing the immediate need to reboot to upgrade the kernel, instead allowing the downtime to be scheduled. It is a part of the Ubuntu Pro offering.
The Canonical Livepatch Client is an application that runs on your machine and periodically checks for patches.
Enable snaps on Kubuntu and install canonical-livepatch
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.