Virtually every single kernel update will have some sort of security fixes that close up holes that have been discovered.
This is probably one of the most important reasons to update your kernel, as you’ll always be safer with a patched kernel.
In fact, if you wanted to tackle either task you were bound for the command line.
For some new users this left their machines outdated or without applications they needed. Now Linux is exponentially more user friendly - to the point where so much is automatic and ¬†that today's Linux hardly resembles yesterday's Linux.
Not only do kernel updates bring with it security fixes, but it can fix other issues that could possibly make the system crash through regular use.
Some people argue that constantly updating the kernel actually decreases the overall system stability because you’ll be running on a kernel that you’ve never used, so you cannot assume that it will work as well as the kernel you were previously running on.
Additionally, each kernel that you update to will have been tested for at least a couple of days by developers and test users to ensure that it runs without a hitch.But your distribution constantly asks you to update your kernel.Why should you do this when it’s been running just fine?While those were the updates you get with minor kernel updates (say 3.2.0 to 3.2.1), let’s check out some improvements you can commonly see with major updates (think 3.2 to 3.3).First of all, every major kernel update is guaranteed to include the latest open source drivers for all of your devices.Occasionally, major updates to the kernel in Linux also brings some new functions.These functions are basically parts of the kernel that programs can use to do some sort of task or operation.If you’re using a Linux distribution like Ubuntu or Fedora, you’re also using the Linux kernel, the core that actually makes your distribution a Linux distribution.Windows also has its own kernel that its operating systems use, but Linux is highly modular and therefore the kernel is more commonly discussed as a lot can be done with it.It’s best to have the latest one so you know you won’t come across that issue.Last but not least, many major updates to the kernel improve the overall speed of the system.