ViralTopic

Dell UEFI flash-level patching to bypass DMA protections

March 26, 2026Iceman - post con depression, MDSec

Iceman highlights craigsblackie patching Dell UEFI firmware at the flash level to disable pre-boot DMA protection while the BIOS UI still shows it enabled, and MDSec links it to DMA attacks against TPM-only BitLocker devices.

patching Dell UEFI firmware at the flash level to silently disable pre-boot DMA protection
all while the BIOS UI still shows it as enabled
The patch even survives official firmware updates.
enable DMA attacks against TPM-only bitlockered devices
Iceman - post con depression
MDSec
firmwareuefiphysical-access

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