I'm not sure if somebody already mentioned this here. The article is from 2016:

https://scarybeastsecurity.blogspot.de/2016/11/0day-exploit-compromising-linux-desktop.html

A detailed description how 6502 code in a library playing NES sound files is used to cause some trouble on a linux desktop machine:

https://scarybeastsecurity.blogspot.de/2016/11/0day-exploit-compromising-linux-desktop.html

The fact, that NES sound files are actually 6502 code and the library is emulating a 6502 and a sound chip to "render" waveforms is used to run "bad" 6502 code on a Ubuntu linux machine to execute "none 6502" code. Really cool stuff I think

Mario.

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How should I know what I think, until I hear what I've said.

Indeed we did - see here. It is interesting!