Pre-auth RCE as root in OpenSSH.

https://www.openssh.com/txt/release-9.8

Debian gives more details than just saying it's a race condition. https://security-tracker.debian.org/tracker/CVE-2024-6387

FreeBSD confirms they are affected too, meaning it's not just a Linux problem (despite what some Linux haters are saying). https://vuxml.freebsd.org/freebsd/f1a00122-3797-11ef-b611-84a93843eb75.html