https://xint.io/blog/copy-fail-linux-distributions

according to this (good) blog post the disclosure to the linux kernel security team was already like a month ago so i would imagine the fix is already on a lot of systems

If your system is up-to-date, your kernel has probably already been patched. The patch was added to mainline on April 1, and I think every major distribution will have added it by now.

same, Kubuntu 26.04 asks for my password when running the exploit script