OS release past (or nearing) end of life
This host's operating-system release is at, past, or within 180 days of the end of its standard security support, per the endoflife.date lifecycle dataset. This is NOT automatically "unsupported": many releases keep receiving security fixes past standard support if enrolled in an extended-support programme (Ubuntu Pro/ESM, RHEL EUS/ELS). The alert reconciles the release EOL date with this host's actual enrollment where the agent can read it. Where enrollment cannot be verified, the wording says so rather than assuming the worst. Resolve by upgrading to a supported release, or by confirming/entering extended support. Acknowledge once you have a plan.
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.