It does explain the FDC IO port buffer overrun under the Q&A heading "What is the vulnerability?" What "the actual issue" is depends on your POV.One might argu

It does explain the FDC IO port buffer overrun under the Q&A heading "What is the vulnerability?" What "the actual issue" is depends on your POV.One might argue the big-picture view given in the infographic is closer to providing a workable description of the problem for most people than the bit-twiddly details.