The KernelCare cronjob fails with the following where
$KERNEL_RELEASE is the running kernel version.
Unknown Kernel (CentOS Linux $KERNEL_RELEASE)
Running the command listed below in SSH or WHM >> Terminal as root also results in the same message:
# kcarectl --check
Unknown kernel (CentOS Linux $KERNEL_RELEASE), no patches available
KernelCare will return "Unknown Kernel" when the server's kernel is not compatible with KernelCare. This typically occurs when updating to the latest kernel before KernelCare has released a patch.
Confirm KernelCare has released a patch for the kernel. Please see: Is my kernel patched by KernelCare?