News Summary

Recent advancements in Rowhammer attacks have demonstrated new vulnerabilities in Nvidia GPUs. These attacks, namely GDDRHammer and GeForgeHammer, allow malicious users to gain full root control of host machines by exploiting bit-flip vulnerabilities in GDDR memory used by Nvidia’s Ampere generation GPUs, specifically the RTX 3060 and RTX 6000 models. The attacks operate by forcing bit flips in protected VRAM regions, enabling adversaries to access and manipulate CPU memory, resulting in full system compromise. While mitigations include enabling ECC on the GPU or IOMMU in BIOS, these vulnerabilities pose significant risks, particularly in cloud environments where GPUs are shared among users.