Researchers have demonstrated the first successful Rowhammer bit-flip attack on Nvidia GPUs, dubbed GPUhammer. This marks a significant security vulnerability, as it allows attackers to manipulate data within the GPU's memory. While this is the first instance of such an attack on GPUs, experts predict it likely won't be the last, highlighting the need for increased security measures and further research into GPU memory vulnerabilities. The potential impact could range from minor glitches to more serious system instability and data corruption.