Recently, three improvements were made to the Linux core. How safe is the release then? Exactly what use does this serve?

When people talk about Linux being a "distribution," what precisely do they mean by that term?

There are three new enhancements to the Linux kernel. Threats to the release's security might perhaps arise at some time in the future. What's going to happen?

When creating Linux, why did its creators choose with a kernel that doesn't allow for preemptive multitasking? In a single-processor system, why would you want to use a non-preemptible kernel? But why does employing a system with several processors reduce the value?