The OS normally protects against accessing sensitive parts of the memory space, but DMA bypasses the OS, rendering such protections useless.

Posted in Microcontrollers Tagged code, Direct Memory Access, dma, embedded ← Ultra-Low Power Soil Moisture Sensor Spy Tech: Build Your Own Laser Eavesdropper → ...

Microsoft was sufficiently concerned about the vulnerability of Thunderbolt 3 to Direct Memory Access (DMA) attacks that it opted against including it in its Surface devices.

Vulnerabilities in Dell and HP laptops could allow an attacker to access information and gain kernel privileges via the devices’ Direct Memory Access (DMA) capability.