// #speculative-execution

AMD Discloses Elevation of Privilege Vulnerability in Zen 2 Micro-Op Cache — Microcode and Firmware Updates Required

AMD has disclosed an elevation-of-privilege vulnerability in the micro-op cache of Zen 2 processors, where a low-privileged process can exploit speculative execution behaviour to access privileged memory content. Full remediation requires microcode updates delivered via OEM BIOS firmware. Zen 3 and later generations are not affected. Dell PowerEdge EPYC Rome servers and AMD EPYC Rome cloud instances require priority attention.