copy-fail-CVE-2026-31431

Copy Fail (CVE-2026-31431) is a 9-year-old Linux kernel local privilege escalation (LPE) vulnerability discovered by Theori's Xint Code, allowing an unprivileged user to gain root access. It targets system administrators and security researchers, demonstrating a critical flaw in the kernel's copy operation that remained undetected for nearly a decade. The project is interesting because it highlights how deeply embedded, long-lived bugs can persist in core infrastructure, underscoring the importance of continuous kernel auditing.