A new hardware vulnerability named StackWarp affects AMD processors with potential for remote code execution inside confidential VMs. This flaw compromises AMD’s SEV-SNP isolation and can be exploited through hyperthreading, impacting multiple AMD EPYC series processors. #StackWarp #AMDSEV SNP #EPYCProcessors
Keypoints
- The StackWarp vulnerability affects AMD Zen processors from Zen 1 to Zen 5.
- It enables attackers with privileged control to manipulate VM control flow and extract sensitive data.
- The flaw is linked to microarchitectural optimization of the stack engine, bypassing memory encryption safeguards.
- Microcode updates and firmware patches have been released, with additional patches scheduled for April 2026.
- Mitigation involves disabling hyperthreading and applying vendor-provided security updates.
Read More: https://thehackernews.com/2026/01/new-stackwarp-hardware-flaw-breaks-amd.html