

You confused “obscurity” as in a synonym for low popularity with the word “obscurity” as in people not knowing how it works and people deliberately hiding the inner workings of a system.
Everyone using Linux can know how it works, that’s the opposite of obscurity in the sense it is used within “security by obscurity”.
Apart from that, Linux is very popular, just not on the Desktop. It is therefore not obscure in the sense of popularity either, at least the components which are hit by the bug mentioned in the article.






You quoted something directly contradicting what you said. Nothing is concealed, every line of erroneous code could have been analysed for 15 years. All information needed to find the bug was public since it the code has been written and checked in publicly.