Did you think Meltdown was bad? Meet the Windows 7 Meltdown patch from January. It stopped Meltdown but opened up a vulnerability way worse… It allowed any process to read the complete memory contents at gigabytes per second, oh – it was possible to write to arbitrary memory as well. This is the story about how the newly developed PCILeech Memory Process File System was used to spot Total Meltdown. How I came to believe Total Meltdown to be already fixed and how I released this potent kernel privilege escalation vulnerability as a 0-day.