Our Cyber Reasoning System, Buttercup, placed in the top 7 out of 39 teams competing in the semifinal round held at DEF CON 2024. The AIxCC stage at DEF CON featured talks from cybersecurity and AI leaders, including Dr. Kathleen Fisher (Director of DARPA’s Information Innovation Office), Heather Adkins (VP of Security Engineering at Google), and industry panels on topics like “The Modern Evolution of LLMs” and “How Competitions Can Fuel Innovation.” Notably, Team Atlanta’s CRS discovered a real null dereference bug in SQLite during the competition, demonstrating the potential real-world impact of AIxCC.