Ledger Research Exposes ‘Unpatchable’ Silicon Flaw in MediaTek Chips; Mobile Wallets at Risk

• Ledger Donjon shows EM pulses can break MediaTek Dimensity 7300 boot ROM
• Attackers gain EL3 control within minutes once the timing window is mapped
• Ledger says smartphone wallets face lasting risk and need secure-element hardware

Security researchers at Ledger have identified a critical, unpatchable vulnerability in the silicon architecture of MediaTek’s Dimensity 7300 processor, effectively shattering the “Root of Trust” for millions of Android devices. 

The findings, published by Ledger’s Donjon unit, detail a hardware-level exploit that allows attackers to bypass all security layers and seize control of the device’s most privileged execution mode. 

The ‘Silicon Permanence’ Problem

The vulnerability resides in the Boot ROM, the immutable “read-only” code baked into the processor during manufacturing. Because this code is etched into the silicon, it ca…

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