Junwha Hong

I am a Research Officer at the Agency for Defense Development (ADD), working on LLM serving in heterogeneous clusters and efficient vision inference.

My current research is advised by Prof. Olivia Hsu (CMU) and Prof. Jongse Park (KAIST). Previously, I worked on memory bug detection and fuzzing at UNIST S2Lab under Prof. Yuseok Jeon (Korea University).

Publications

IEEE S&P 2025 acceptance rate: 14.8%

CMASan: Custom Memory Allocator-aware Address Sanitizer

Junwha Hong, Wonil Jang, Mijung Kim, Lei Yu, Yonghwi Kwon, Yuseok Jeon

The first CMA-aware address sanitizer designed to detect memory bugs in objects allocated by custom memory allocators. CMASan discovered 19 security vulnerabilities, including 7 CVEs: CVE-2023-7104, CVE-2023-7152, CVE-2023-7158, CVE-2024-8946, CVE-2024-8947, CVE-2024-8948, and CVE-2024-11235.

Paper Code

Tortoise and Hare Guidance project visual

NeurIPS 2025 acceptance rate: 24.52%

Tortoise and Hare Guidance: Accelerating Diffusion Model Inference with Multirate Integration

Yunghee Lee, Byeonghyun Pak, Junwha Hong, Hoseong Kim

A training-free strategy for accelerating diffusion sampling by treating classifier-free guidance as a multirate system.

Project Paper Code

To
appear

IISWC 2026 acceptance rate: 40.16%

Understanding and Exploiting Diagonal Attention Sparsity in Autoregressive Image Generation

Daeun Kim, Junwha Hong, Changhun Oh, Yoonsung Kim, Yoonhyeong Lee, Jongse Park

Paper

To
appear

IISWC 2026 Short Paper

How Far Can PIMs Replace GPUs in Energy-Efficient Multi-Turn Agent Serving?

Junwha Hong, Guseul Heo, Hyunsu Ye, Jongse Park, Olivia Hsu

Paper

Experience

Agency for Defense Development (ADD)

Mar 2024 - Present

Research Officer for National Defense (First Lieutenant)

Manager: Dr. Eunjin Koh

UNIST S2Lab

Dec 2020 - Nov 2024

Undergraduate Researcher

Advisor: Prof. Yuseok Jeon (Korea University)

University of Virginia

Apr 2023 - May 2023

Visiting Student Researcher

Research visit with Prof. Yonghwi Kwon (University of Maryland)

Education

Ulsan National Institute of Science and Technology (UNIST)

Mar 2020 - Feb 2024

B.S. in Computer Science and Engineering

GPA: 4.13/4.3, summa cum laude (ranked 4th out of 296 students).

Activities: 11th President of HeXA, Hacker's eXciting Academy.

Honors

Top Prize (Minister of Science and ICT Award), 2022 Millitech Challenge, Republic of Korea.
Excellence Prize, 2021 UNIST-POSTECH-KAIST Data Science Competition.
National Science & Technology Scholarship, 2022.