⬇ Download holy card: ·
Saint BadRAM, Who Lied About Its Size
Patron of encrypted VM memory, SPD chips, and RAM modules that claim more than they have.
Life
On 10 December 2024 a team of researchers presented BadRAM: with a Raspberry Pi Pico, a DDR socket and a 9-volt battery, for around ten euros, they tampered with a module's SPD chip so it reported more capacity than it really had. The CPU then accessed 'ghost' addresses silently mapped onto real memory, bypassing AMD SEV-SNP protections and allowing the attestation of encrypted virtual machines to be forged.
Prayer
O Saint BadRAM, who inflates the modules' size to fool the CPU, let our memory declare only what it holds. Amen.
How to celebrate
Celebrated by installing the AMD firmware update and choosing modules that lock the SPD at the factory.
Whoever claims to be big is making room for a guest.