Could virus writers start to target hardware?

On August 25th, security firm Symantec engineers announced they had discovered a virus that leveraged a flaw in the AMD64 CPU. This virus, Any patch applied to fix a hardware fault could be disabled or circumventedcalled W32/W64.Bounds, was capable of binding itself to Windows executables in such a way that made it hard to detect. However, it's now been shown that this virus doesn't have anything to do with in AMD CPUs, but instead with the X86-64 instruction set itself.

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