Supporting Rowhammer research to protect the DRAM ecosystem

**Executive summary:** Google and academic partners (ETH Zurich) developed FPGA-based DDR5 Rowhammer test platforms and the "Phoenix" research demonstrating novel attack patterns that bypass enhanced in-DRAM TRR defenses and enabled a proof-of-concept Rowhammer privilege escalation on a production-grade desktop; the report describes limitations of current TRR/ECC mitigations, recommends adoption of JEDEC's PRAC standard, and outlines testing and mitigation paths for DDR5 systems.