Researchers at Defcon are set to reveal a critical vulnerability in AMD chips, known as "Sinkclose," which affects hundreds of millions of processors. This flaw has existed in AMD chips since 2006, allowing attackers to gain deep access to privileged system areas and install virtually undetectable, unfixable malware. Despite the potential for catastrophic exploitation, AMD has begun rolling out patches to address the issue, noting that the vulnerability requires kernel access to be exploited.