Copy-fail-C, a portable C port of the CVE-2026-31431 Copy Fail Proof-of-Concept (PoC) with a checker.

Copy-fail-C addresses a critical need in cybersecurity: the ability to reliably test and verify vulnerabilities across diverse hardware architectures. By porting a significant PoC (CVE-2026-31431) from Python/x86_64 shellcode to portable C with `nolibc`, the author significantly enhances its utility for security researchers and developers. This eliminates environmental dependencies and architecture-specific limitations, enabling broader testing and validation of the vulnerability. The market implication is improved security posture through more comprehensive testing capabilities. This project highlights the ongoing demand for low-level, highly portable security tools that can operate in varied and constrained environments, crucial for robust vulnerability assessment and patch verification in enterprise and embedded systems.