Wikipedia
KernelCare
KernelCare is a live kernel patching service that provides security patches and bugfixes for a range of popular Linux kernels that can be installed without rebooting the server
KernelCare software is released under GPL2. The first beta was introduced in March 2014 and it was commercially launched in May 2014. KernelCare supports CentOS/ RHEL 5.x, 6.x and 7.x; CloudLinux 5.x, 6.x and 7.x; Parallels Cloud Server; Virtuozzo; OpenVZ; Debian 6.x, 7.x and 8.x; and Ubuntu 14.04 LTS, 15.10