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NVIDIA GPUThor mitigation advisory

Advisory/Mitigation
First reported
Last updated
Happening score
H score 26
1 unique sources, 1 articles

Summary

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NVIDIA issued a GPUThor mitigation advisory for NVIDIA GPUs facing a Rowhammer-style ECC bypass that can lead to DoS and root-level privilege escalation. The guidance centers on SYS-ECC, IOMMU/DMA isolation, telemetry monitoring, and restricting untrusted workloads on affected systems.

Related Happenings

NVIDIA Ampere-class GPUs GPUThor Rowhammer ECC bypass privilege-escalation flaw

Vulnerability
H score19 First: 26.08.2026 21:48 Last: 26.08.2026 21:48 Sources 1

How related: A newly disclosed Rowhammer attack called GPUThor can bypass error-correcting code (ECC) protections on NVIDIA GPUs, enabling denial-of-service (DoS) and root-level privilege escalation.

About this happening: GPUThor is a newly disclosed Rowhammer vulnerability on NVIDIA Ampere-class GPUs that can bypass ECC protections, creating DoS and root-level privilege escal...

Open Happening

Bit2Watt GPU power modulation research on grid destabilization

Technical Analysis
H score22 First: 21.07.2026 14:24 Last: 21.07.2026 14:24 Sources 1

About this happening: Researchers published Bit2Watt, showing that ordinary cloud GPU workloads can be shaped into kilohertz-range power oscillations that may destabilize grid behavior...

Open Happening

Nvidia GPU GPUBreach Rowhammer-style page-table corruption privilege-escalation flaw

Vulnerability
H score19 First: 07.04.2026 14:31 Last: 07.04.2026 14:31 Sources 1

About this happening: Researchers demonstrated GPUBreach, a Rowhammer-style weakness in Nvidia GPUs that can corrupt GPU page tables and enable arbitrary read-write access. When pai...

Open Happening

GPUBreach GPU Rowhammer research enables GDDR6 page-table corruption and privilege escalation

Technical Analysis
H score26 First: 07.04.2026 00:44 Last: 07.04.2026 00:44 Sources 1

About this happening: GPUBreach research shows Rowhammer bit flips in GDDR6 can corrupt GPU page tables, creating a path to arbitrary GPU memory read/write and potential full syst...

Open Happening

Timeline

  1. 26.08.2026 21:48 2 articles · 1h ago

    NVIDIA publishes GPUThor hardening guidance

    Mitigation Patch Update

    NVIDIA published guidance for GPUThor on August 21 after researchers reported the findings on April 29. The advisory recommends enabling SYS-ECC and IOMMU/DMA isolation, monitoring GPU error telemetry, and restricting the sharing or execution of untrusted CUDA workloads to reduce the risk of ECC bypass, denial of service, and privilege escalation on vulnerable NVIDIA GPU systems.

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  2. 26.08.2026 21:48 1 articles · 1h ago

    University of Toronto researchers demonstrate GPUThor on Ampere-class NVIDIA GPUs

    Technical Analysis Update

    University of Toronto researchers disclosed GPUThor and showed that the Rowhammer technique can bypass ECC protections on Ampere-class NVIDIA workstation GPUs with GDDR6 memory, including the RTX A4000, RTX A4500, RTX A5000, and RTX A6000. They also reported that the attack can generate double-bit errors and incorrect triple-bit error repairs, and that repeated hammering can drive an ECC-enabled RTX A6000 into a denial-of-service state that resets every two hours and terminates all workloads.

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