Red Hat Linux 6.0, back in 1999. It was one of the first distributions to include GNOME as the default desktop environment.

I rely on notifications from glsa-check or my distro's package manager. I was notified about a problem with xz-utils on Thursday evening, but didn't see anyone post about it until Friday morning.

glsa-check is a command-line tool included with the gentoolkit package in Gentoo Linux. Its primary function is to scan your system for installed packages that are vulnerable according to Gentoo Linux Security Advisories (GLSAs). GLSAs are official notifications from the Gentoo security team about security vulnerabilities that affect packages in the Gentoo repository.

It was also on Gentoo. I had this version installed for a day or two.

Yeah, it's probably fine. I also don't use systemd. I was just pointing out that another rolling release distribution had the affected version.

Same here. Our servers are so out of date that we might not have a version of xz with any commits from Jia Tan at all.