{
  "id": 6155494,
  "title": "Another Rowhammer attack has been detected, and Nvidia workstation GPUs are firmly in the firing line",
  "url": "https://urgent.news/2026/09/07/another-rowhammer-attack-has-been-detected-and-nvidia-workstation",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-07T18:05:00.000Z",
  "source": {
    "name": "TechRadar",
    "slug": "techradar",
    "url": "https://www.techradar.com/pro/security/another-rowhammer-attack-has-been-detected-and-nvidia-workstation-gpus-are-firmly-in-the-firing-line"
  },
  "original_language": "en",
  "account": "A new Rowhammer attack, dubbed GPUThor, has emerged with the capability to bypass error correction on Nvidia workstation GPUs, potentially leading to a root shell on the host system. This attack targets four Ampere workstation cards equipped with GDDR6 memory, including the RTX A4000, A4500, A5000, and A6000 models. Researchers from the University of Toronto disclosed the technique, which exploits non-uniform hammering to deliver significantly higher bit flipping intensity compared to previous attacks. By disabling Nvidia's error correction capabilities through ECC, the researchers were able to achieve 6.6 times the hammering intensity of prior attacks, resulting in up to 377,000 bit flips per gigabyte. This poses a serious threat, as GPU Rowhammer is now on par with CPU Rowhammer attacks. When ECC is enabled, GPUThor still forces one GPU reset every two hours, causing all running processes to terminate and flagging the GPU as needing replacement within a day. The researchers have notified Nvidia, as well as Google, Microsoft, and AWS about the vulnerability, and a code release is expected in November, although no official patch has been issued yet.",
  "summary": "Nvidia spent a year telling people ECC was the answer to GPU Rowhammer. GPUThor might have just proved them wrong.",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 3,
    "also_reported_by": [
      {
        "outlet": "TechRadar",
        "title": "Nvidia's RTX Spark is more impressive for gaming than I expected after going hands-on at Gamescom 2026 — but I still have one wish",
        "url": "https://urgent.news/2026/09/05/nvidias-rtx-spark-is-more-impressive-for-gaming-than-i-expected-after",
        "published": "2026-09-05T14:00:00.000Z"
      },
      {
        "outlet": "Tom's Hardware",
        "title": "Nvidia returns to selling Founder's Edition RTX 50-series GPUs at MSRP in person at PAX West — Verified Priority Access has RTX 5090, RTX 5080, and RTX 5070 at list price",
        "url": "https://urgent.news/2026/09/05/nvidia-returns-to-selling-founders-edition-rtx-50-series-gpus-at-msrp",
        "published": "2026-09-05T15:04:13.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}