As you might be aware, a critical bug just has been uncovered that puts an incredible number of systems at risk. The main targets are Mac and Linux systems, the latter being the most commonly used for web servers (the machines that run all your favorite websites).
Well, that’s easy, just patch it, would you say. Yes, a patch exists, however things might not be as simple as that. In the real world, countless systems are set in a “fire-and-forget” mode where patches are applied from times to times, and systems rarely completely upgraded.
There can be many reasons for that.