Kernel security updates without reboot

Hello. Do you have any solutions for applying kernel updates without reboot? There hav e some softwares (commercial) like Oracle Ksplice. Do you have any other suggestions?

Thanks!
Have a great day!

First, the kernel is not the only package that requires reboot (for the update to become effective): Identify packages that will require a system reboot after an update - Red Hat Customer Portal


RHEL has kernel live patching option: A guide to kernel live patching on Red Hat Enterprise Linux 7, 8, and 9 - Red Hat Customer Portal
that depends on Red Hat Content Delivery Network(CDN).

Enterprise Linux Comparison | AlmaLinux Wiki lists “KernelCare” for AlmaLinux (8). No idea what that is.


IMHO, if a “service” is so vital that downtime is not an option, then it must run on redundant servers. One should be able to always reboot such servers one at a time.

You know how CloudLinux backed AlmaLinux? They’ve also backed TuxCare which has a KernelCare brand, providing live kernel patching services.

Note that like most other such services it is not free as in free beer.

Also they do support AlmaLinux 9 too.