NixOS must run a supported release of the operating system.

Security flaws with operating systems are discovered daily. Vendors are constantly updating and patching their products to address newly discovered security vulnerabilities. Organizations (including any contractor to the organization) are required to promptly install security-relevant software updates (e.g., patches, service packs, and hot fixes). Flaws discovered during security assessments, continuous monitoring, incident response activities, or information system error handling must also be addressed expeditiously.

Verify NixOS is running a supported version with the following command:

$ nixos-version

23.11.20231129.057f9ae (Tapir)

If the NixOS is not running a supported version, this is a finding.

Update to a supported version of the operating system.