Hardware Videos

RowHammer, RowPress & Beyond: Invited Talk at Dagstuhl MAD Seminar - 27.11.2023

The Dagstuhl MAD seminar talk examined RowHammer and related DRAM disturbances, tracing their origins from early research to today’s large‑scale security implications. The speaker highlighted how shrinking DRAM cells increase electrical noise, making bit flips more likely, and presented data from Facebook, Microsoft, and Google that link newer chip generations to higher failure rates. Key technical insights included the activation‑count threshold dropping from ~239 k to a few thousand as process nodes advance, and the distinction between single‑sided and double‑sided hammering that dramatically raises flip probability. The open‑source testing platform built by the researchers allows exhaustive stress‑testing beyond manufacturer specifications, revealing that over 80 % of modern DRAM from the three major vendors is vulnerable. Notable examples featured Google Project Zero’s exploitation of RowHammer to corrupt page tables and break native‑client sandboxes, as well as the “sandwich” technique that places a victim row between two aggressor rows for maximal disturbance. The talk also referenced variable retention time phenomena and flash‑memory read‑disturb issues, underscoring that these hardware quirks span multiple memory technologies. The broader implication is clear: memory can no longer be treated as a passive component. System architects must co‑design hardware and software safeguards—such as stronger isolation, refresh‑rate adaptations, and error‑correcting mechanisms—to preserve safety, reliability, and security as DRAM scaling continues toward 2025‑2030.