My current kernel version is "2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 athlon i386 GNU/Linux". I want it to be upgraded since it is old. I have been told by our server management company that the latest kernel distributed from yum is kernel.i686 0:2.6.9-78.0.22.E. Can anyone tell me if this version is safe and secure enough? It is a CentOS release 4.7 (Final) server with cPanel installed.
Unless you need something in a newer kernel, you should just update CentOS 4.x to its latest kernel version. They backport security fixes, etc. to the kernels. The latest kernel version in CentOS 4.x is safe.
There is nothing wrong with using CentOS 4.x. It is supported until February 29, 2012.