On Mon, 7 Nov 2016 22:33:22 -0600 Dipal Bhatt wrote:
Simply updating these packages on 6.3, would there be any issues w/o updating rest of the packages from 6.3 to 6.8?
I suppose you could try it and see what happens. That comes with a two-part warranty: If it breaks, you own both pieces.
As you have been told earlier, the only way to update your system properly is to run this command:
yum update
After that you will have the latest version of Centos 6 on your system.
Anything other method will leave you with a system that is definitely insecure and probably broken.