For each Ubuntu LTS release, Canonical maintains the Base Packages and provides security updates, including kernel livepatching, for a period of ten years. The lifecycle consists of an initial five-year maintenance period, during which maintenance updates are publicly available without an Ubuntu Advantage Subscription, and five years of Expanded Security Maintenance (ESM). The full lifecycle is available with an Ubuntu Advantage subscription or a free personal subscription.
20.04 can receive security updates up until 2030 by signing up for a free personal ESM account.