# GPUThor researchers report host-root route on vulnerable Nvidia workstation GPUs

_Thursday, August 27, 2026 at 4:13 AM EDT · Security · Latest · Tier 1 — Major_

![GPUThor researchers report host-root route on vulnerable Nvidia workstation GPUs — Primary](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj2AxQ4SD6_1WKkpvBVi_M7oKLMeBAiKU4Ek4HbnJXHLX5xSbUg7ky1ITdUJY91n-zZGyK55-qQRd24PWRymLmik7cRl4CYPoaeZL5JuLedlsOTJGHChwF1eQWGhUE6AhOZUSW7CoajwQcKCu8E_zrYn8I6203Nrvr9NvheYL-5ISm0fs1xdWNiKGWqIs0/s1700-e365/nvidia-bits.jpg)

University of Toronto researchers disclosed GPUThor, a Rowhammer attack they report can induce multi-bit errors on four Nvidia Ampere workstation GPUs with GDDR6 memory and use them for denial of service or host-side privilege escalation.

The attack requires an unprivileged CUDA kernel on the target GPU, including from a co-tenant on a shared card. On a locally owned RTX A6000 with ECC enabled, the researchers reported detectable uncorrectable errors and one silent data-corruption event over a day. Nvidia guidance says System-Level ECC mitigates the Rowhammer problem.

## Sources

- [The Hacker News](https://thehackernews.com/2026/08/gputhor-rowhammer-defeats-ecc-on-nvidia.html)

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Retrieved: 2026-08-27T11:54:55.170Z
Publisher: Tech & Business (techandbusiness.org)