FBI: US flight ground stop not caused by cyberattack, software update probed

The FBI's early assessment shifts the frame from security incident to operational failure, which matters for how aviation authorities and their technology vendors are judged. A software update as the suspected trigger puts the spotlight on change-management and rollback procedures at the agencies and contractors running air traffic systems, not on external adversaries. The open question is whether investigators confirm the software link, and whether the incident prompts scrutiny of how updates are tested before deployment across critical infrastructure.