> I'm curious if the use of little add on MCUs to cellphone designs like this opens up the opportunity to back door into the OS I would say that the possibilit

> I'm curious if the use of little add on MCUs to cellphone designs like this opens up the opportunity to back door into the OS I would say that the possibility is there - imagine a buffer overflow (or something as bad) in the driver running in the kernel. However, getting the malicious firmware onto the MCU would be the difficult part. But I suppose even a purposefully "bad" batch of MCUs that have an extra core executing malicious code is not exactly science fiction in these times :P > could be hard fault handler getting invoked due to either div by 0 or incorrect linkage Interesting! I will look into this, cheers. > Great write-up BTW - subscribe! Thank you, much appreciated!