New Security Advisor notifications with High importance

I am getting this notification in my email: The system kernel is at version “4.18.0-477.21.1.el8_8.x86_64”, but the system is configured to boot version “4.18.0-477.27.1.el8_8.x86_64”. Reboot the system. If the problem persists, check the GRUB boot configuration. Can someone explain how Continue reading New Security Advisor notifications with High importance