The initial news stories on this bug seem to be snowballing as further processor chips are found that contain the problem.http://www.bbc.co.uk/news/technology-42575033
Apple has said that all iPhones, iPads and Mac computers are affected by two major flaws in computer chips.
It emerged this week that tech companies have been racing to fix the Meltdown and Spectre bugs, that could allow hackers to steal data.
Apple said it had already released some patches but there was no evidence that the vulnerability had been exploited.
The Meltdown and Spectre flaws are found in all modern computer processing units - or microchips - made by Intel and ARM, and together the firms supply almost the entire global computer market.
It seems Athlon chips are safe but you wouldnt know that by reading this above article
Theres some further info here regarding the scope of this problemhttp://www.bbc.co.uk/news/technology-42564461