Copy Fail vulnerability in Linux

Copy Fail vulnerability in Linux CVE-2026-31431 Copy Fail is a local privilege escalation vulnerability that has now been resolved in most major distributions. You can find out more about specific distros like Ubuntu and Amazon Linux. You can quickly see if your system is vulnerable by executing the python script provided at copy.fail. The site also provides mitigation information. If you have a recent kernel on a distribution like Ubuntu 26.04 you should be good.