About Me

Hi! I’m Jaeyoung Chung, a Ph.D. student in the CompSec Lab at Seoul National University, advised by Prof. Byoungyoung Lee.

My research focuses on Linux and Android kernel security. I am especially interested in concurrency bugs, including scalable discovery, deterministic reproduction, and exploitability analysis. I also work on GPU driver security, analyzing emerging attack surfaces and designing practical defenses.

My goal is to make systems more secure by systematically discovering unknown bugs and building defenses that prevent their exploitation.

Publications

* indicates equal contribution

1. DMGuard: Safeguarding Kernels from Physical Page Use-After-Free Vulnerabilities
   Juhee Kim*, Jaeyoung Chung*, Dae R. Jeong, and Byoungyoung Lee
   USENIX Security Symposium (Security), 2026 💻 Code

2. GHost in the SHELL: A GPU-to-Host Memory Attack and Its Mitigation
   Sihyun Roh, Woohyuk Choi, Jaeyoung Chung, Yoochan Lee, Suhwan Song, and Byoungyoung Lee
   IEEE Symposium on Security and Privacy (S&P), 2026

3. TikTag: Breaking ARM’s Memory Tagging Extension with Speculative Execution
   Juhee Kim, Jinbum Park, Sihyun Roh, Jaeyoung Chung, Youngjoo Lee, Taesoo Kim, and Byoungyoung Lee
   IEEE Symposium on Securit`y and Privacy (S&P), 2025

Vulnerabilities & Exploits

• Google kernelCTF
  • Bad Epoll: CVE-2026-46242 on lts-6.12.67 and cos-121-18867.294.100 (0-day)
    🌐 Website💻 Code
• Arm Mali GPU driver
  • CVE-2025-0819: Concurrency UAF vulnerability
• KrCERT / KISA Hall of Fame (2024), Ranked 10th
  • Reported 9 KVE-assigned remote code execution vulnerabilities in Korean image-viewer software

Contact

• Email: jjy600901@snu.ac.kr
• GitHub: github.com/J-jaeyoung
• Lab: CompSec Lab, Seoul National University

Theme: Researcher by Ankit Sultana