AMD Warns of Critical Side-Channel Attack Affecting Wide Range of Chips

AMD is warning users about a newly discovered side-channel attack, Transient Scheduler Attack (TSA), impacting a broad range of its chips and potentially leading to information disclosure. TSA comprises four vulnerabilities, rated from low to medium severity, yet security firms assess the threat as critical. Exploitation requires high complexity, needing an attacker with arbitrary code execution on the target machine and multiple executions for reliable data exfiltration. Worst-case scenarios could lead to OS kernel data leaks. AMD has released patches, but some mitigations may impact performance.