Ksplice Uptrack is described as 'Install Linux kernel updates without rebooting, saving you time and improving your security'. There are four alternatives to Ksplice Uptrack for Linux, SUSE Linux Enterprise and Ubuntu. The best alternative is KernelCare. It's not free, so if you're looking for a free alternative, you could try kpatch or kGraft.
The best way to live patch your Linux kernel is automatically and without rebooting servers. Run your servers without interruptions by auto-applying a security update to the kernel. Without reboots, from only $2.25 per mo.
Livepatch eliminates the need for unplanned maintenance windows for high and critical severity kernel vulnerabilities by patching the Linux kernel while the system runs. Reduce fire drills while keeping uninterrupted service with the Ubuntu Livepatch service for up to 10 years.