GPUHammer: New RowHammer Attack Variant Targeting NVIDIA GPUs

NVIDIA has issued a warning to its customers regarding a new variant of the RowHammer attack, dubbed GPUHammer, which targets its GPUs. This attack exploits the memory management mechanisms in GPUs to induce bit flips, potentially leading to data corruption and privilege escalation. The severity of the attack varies depending on the specific DRAM device, platform, and system configurations. NVIDIA recommends enabling Error Correcting Code (ECC) at the system level to mitigate the risk. RowHammer attacks have historically targeted CPUs, but GPUHammer's emergence highlights the evolving nature of these threats. The variability in vulnerability underscores the need for a comprehensive approach to security, including assessment, monitoring, and ongoing research. Organizations using NVIDIA GPUs should enable ECC and conduct thorough assessments of their systems to understand their specific risk levels. Regular monitoring and staying updated with the latest security advisories are also crucial. The impact of such attacks could be significant, especially as GPUs become more integral to computing tasks in data centers and AI/ML applications. This underscores the need for robust security measures and continuous vigilance against evolving threats.