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GPUThor Rowhammer attack beats ECC on NVIDIA workstation GPUs

📅 26 August 2026 at 10:43 UTC📰 Cyber InsiderView original source ↗
GPUThor Rowhammer attack beats ECC on NVIDIA workstation GPUs

University of Toronto researchers have developed a new Rowhammer technique named GPUThor that can overwhelm error-correcting memory on several NVIDIA workstation GPUs, enabling crashes and even privilege escalation to root. The attack produces up to 23,500 times more bit flips than the first GPU Rowhammer attack, bringing GPU attack rates close to those seen on … The post GPUThor Rowhammer attack beats ECC on NVIDIA workstation GPUs appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

GPUThor is a Rowhammer attack that can overwhelm error-correcting memory on NVIDIA workstation GPUs, enabling crashes and privilege escalation to root. The attack produces up to 23,500 times more bit flips than the first GPU Rowhammer attack.

⚙️Technical Details
Affected Systems
NVIDIA workstation GPUsAmpere-generation RTX A4000, A4500, A5000, and A6000 workstation cards
Attack Vectors
Non-uniform patterns that hammer aggressor rows more frequently while retaining enough decoy activity to evade TRR
💥Impact Assessment
Severity: critical
Who Is at Risk
Administrators of NVIDIA workstation GPUs and users of affected systems
🛡️Recommended Actions
1Enable and verify host IOMMU/DMA isolation
2Monitor ECC errors, unexpected resets, and row-remapping events
3Evaluate GPU tenancy and workload isolation
📦Affected Products
Product Family: NVIDIA workstation GPUsSpecific Models:RTX A4000A4500A5000A6000

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