After receiving the following warning in WHM, I would like to ask some questions here:
There are several known Linux kernel exploits which may allow local privilege escalation. These exploits have become commonplace in recent weeks and can be avoided by ensuring that your kernel is updated to the latest available version. While cPanel will help ensure your system services and software are up to date, kernel updates are outside the scope of cPanel. Kernels with known vulnerabilities include, but are not limited to, 2.6.9-22 and 2.6.9-34. Please check your running kernel for updates periodically. This will help ensure the overall integrity of your server and data.
My Kernel is 2.4.21-40.ELsmp and I am running Centos 3.7.
Which is the latest kernel version for me? (2.4.21-47.EL ?).
Is there a serious reason for switching to Centos 4?
How long does it take for updating kernel and how long for updating to Centos 4 (for a professional to perform these tasks)?