Cybersecurity

2026-03-15

Exploiting CVE-2025-40019

An integer underflow in the Linux kernel's ESSIV wrapper, from the bug to exploitation.

2024-02-11

Notes and solutions from 0xL4ugh CTF.

2023-09-13

A collection of challenge writeups from HITCON qualifiers.

2023-08-02

Working through zeroday, kcipher, and more.

2023-06-05

Bugs, unintended solutions, and the occasional heap adventure.

2023-05-02

Challenge notes from Cyber Security Challenge Germany.

2022-08-31

EBCSIC: from a strange instruction set to a working exploit.

2021-02-25

Reversing a kernel module and exploring a heap overflow.