New UEFI Flaw Enables Early-Boot DMA Attacks on ASRock, ASUS, GIGABYTE, MSI Motherboards
Dec 19, 2025
Firmware Security / Vulnerability
Certain motherboard models from vendors like ASRock, ASUSTeK Computer, GIGABYTE, and MSI are affected by a security vulnerability that leaves them susceptible to early-boot direct memory access ( DMA ) attacks across architectures that implement a Unified Extensible Firmware Interface ( UEFI ) and input–output memory management unit ( IOMMU ). UEFI and IOMMU are designed to enforce a security foundation and prevent peripherals from performing unauthorized memory accesses, effectively ensuring that DMA-capable devices can manipulate or inspect system memory before the operating system is loaded. The vulnerability, discovered by Nick Peterson and Mohamed Al-Sharifi of Riot Games in certain UEFI implementations, has to do with a discrepancy in the DMA protection status. While the firmware indicates that DMA protection is active, it fails to configure and enable the IOMMU during the critical boot phase. "This gap allows a malicious DMA-capable Peripheral Component Interconnect E...
