CloudLinux announced as part of its TuxCare security services the launch of QEMUCare Live Patching Service. The service is available for Linux systems running as virtualization hosts through QEMU, the open source emulator and hardware virtualization platform. Virtual machines running on the updated systems will not be paused, migrated or in any way affected by the patching process. This saves considerable time and makes bandwidth available to update the whole infrastructure, reducing the system exposure time to security vulnerabilities.
Source: https://www.helpnetsecurity.com/2021/07/01/cloudlinux-qemucare-live-patching/