E03-AX: Yes
Rationale
Linux 6.12 publicly supplies the selected classic NET/ROM-over-AX.25 implementation, including the native socket and routing code, under GPL-compatible kernel terms (the NET/ROM source declares GPL-2.0-or-later). This supplies an open implementation of the private serial role; executable configuration and physical serial testing remain unqualified.
Assessment method
Specification/source/dependency analysis; no new runtime execution
Source context
Primary documentation and explicitly selected composition; documentary review 2026-10-15
Outstanding qualification
Use the existing Linux source witness and its stock serial/AX.25 support. No RF test or regulator approval inferred.