copy-fail-c

Copy Fail is a cross-platform implementation in C of the Copy Fail Linux Local Privilege Escalation (LPE) exploit (CVE-2026-31431), designed to demonstrate the vulnerability on various architectures without relying on per-architecture hex blobs or inline assembly. The tool includes multiple variants for payload delivery, such as a binary-mutation dropper and a variant that modifies the `/etc/passwd` file, as well as a non-destructive vulnerability checker. It requires no additional libraries and supports extensive architecture compatibility through the included nolibc.