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GPUThor: New Rowhammer Attack Defeats NVIDIA ECC Protection to Achieve Host Root Access

Key Findings University of Toronto researchers developed GPUThor, a Rowhammer attack that defeats ECC protection on NVIDIA RTX A-series GPUs with GDDR6 memory Attack enables privilege escalation to root on host systems and requires only unprivileged CUDA kernel execution Four NVIDIA GPUs confirmed vulnerable: RTX A6000, A5000, A4000, and A4500 Non-uniform hammering technique achieves 72,000 to 377,000 bit flips per gigabyte with ECC disabled, up to 23,000 times more effective

Aug 284 min read

GPUBreach: New GPU Rowhammer Attack Achieves Full System Compromise Through GDDR6 Bit-Flips

Key Findings New RowHammer attack called GPUBreach exploits GDDR6 memory bit-flips in NVIDIA GPUs to achieve full CPU privilege escalation and system compromise Attack corrupts GPU page tables to grant arbitrary GPU memory read/write access to unprivileged processes Uniquely bypasses IOMMU protections without requiring them to be disabled, unlike competing attacks Researchers demonstrated the exploit on NVIDIA RTX A6000 GPU, spawning a root shell on the host system Current mi

Apr 73 min read