LTS releases are common in operating systems and infrastructure software. They let organizations stay on a relatively stable major version while receiving maintenance and security updates under the vendor's published policy.
The label is vendor-specific. It does not promise that every application bundled with the operating system follows the same upstream schedule, or that every security flaw will be fixed forever. The supported period, included components and possible extended coverage must be checked separately.
An LTS package may also carry backported security fixes without adopting the newest upstream version string. That is normal for distributions that prioritize compatibility across years of updates.
When planning a deployment, record the product's exact LTS release, support end date and maintenance channel. Apply its package updates, verify advisory coverage and plan the next migration before support expires.