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Achievements

Achievement: Pair Extraordinaire

Achievements

Achievement: Pair Extraordinaire

Highlights

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foxirain/README.md

Taegu Ha

Systems & embedded security

Email · CVE archive · Dreamhack · 한국어

Experience

  • CASO Lab, Kangwon National University · Undergraduate Research Intern
    May 2024 – Jan 2025
  • WhiteHat School, KITRI · Cohort 2
    Mar – Sep 2024

Highlights

2026

  • Authored 3 patches merged into Linux mainline, fixing USB UAC1, PPP, and BPF verifier issues. UAC1 · PPP · BPF
  • Discovered ARM/AArch64 NEON memory errors in libpng and authored the fix shipped in 1.6.56. CVE-2026-33636
  • Reported 3 Critical vulnerabilities across AI products (PraisonAI and Langflow). PraisonAI A2A · PraisonAI CI · Langflow
  • Reported vulnerabilities in ESP32 NBNS and Apache NimBLE ATT, published as CVE-2026-41429 and CVE-2026-45815.
  • GW TakeDown · Galaxy Watch firmware security research. Samsung Mobile Security approved a reward for one report.
    Designed and built RehostRace and VeriRehost for firmware rehosting, execution replay, and analysis of verification flows.
  • Built Adaptive Harness and Agent Security Company for research automation and isolated agent execution.

2025

  • Freelance Development · Designed and delivered a 112-channel LED control system for a psychology research lab, including custom hardware, Raspberry Pi 5 control software, and a 19-page operating manual.
  • Silver Award, Student Division, Gangwon Cybersecurity Hacking Defense Competition (GCHD).
  • Solved 154 Pwnable challenges and reached an overall Wargame rank in the 200s on Dreamhack.

2024

  • GW5 · Reverse-engineered Galaxy Watch5 sensor drivers and SensorHub firmware; built AVB hash verification tools and a custom wired setup for firmware experiments.
  • WhiteGang · Developed Windows user-mode and kernel-driver components for process protection, including DLL loading controls and handle-access restrictions. PalAnticheat · PalAnticheatEx
  • Council Chair's Award, CO-SHOW AutoHack.

2023

  • Excellence Award, Chuncheon Public Data Idea Competition.

Pinned Loading

  1. CVE-public CVE-public Public

    Published CVE case studies and public evidence artifacts

    C

  2. codex-adaptive-oss-vuln-harness codex-adaptive-oss-vuln-harness Public

    Adaptive multi-session OSS vulnerability research with isolated search hypotheses and a shared evidence contract

    Python

  3. linux-kernel-codex-harness-v2 linux-kernel-codex-harness-v2 Public

    Provenance-aware Linux kernel vulnerability research harness used in the investigation of CVE-2026-53075

    Python

  4. agent-security-company agent-security-company Public

    Policy-enforced containment and independent QA for LLM-assisted security research

    Python

  5. PalAnticheatEx PalAnticheatEx Public

    Windows kernel anti-cheat prototype using ObRegisterCallbacks and an IOCTL control path

    C

  6. rehostrace rehostrace Public

    Causality-preserving replay and evidence-driven rehosting for asynchronous components.

    Python