Security Issue Affected?

[rahlquist]

Longsleep said that the backdoor wasn't found in his kernel

That's NOT a backdoor, that's just a piece of code for H3/A83T devices that has been made publicly available on Github (so everyone was able to audit the code) to help debug/root Android devices.

Why do people only read lurid headlines, then do NOT read through the article they link to just to spread FUD again and again?

Since the arstechnica article has been referred please read through this comment here and then stop calling this a backdoor and badmouthing Allwinner.

I should use the Search in forum better.

Don't get me wrong. Comment you provided was read, which I agree that's too obvious to be a real backdoor. That's why I put double quotation marks around it in my original post.
The concern I had was some nasty apps might abuse PINE64 with it.

And when did I ever badmouthing Allwinner?

A backdoor implies it grants access to the device. This did not I believe. This was a privilege escalation. You had to be logged into the device or have code executing on it to even use this "backdoor". 

So its not entirely your fault the press doesn't understand the distinction.