CrowdStrike blames bug for letting bad data slip through, leading to global tech outage

A technician works on an information display near United Airlines gates at Chicago O'Hare International Airport in Chicago, July 19, 2024, after a faulty CrowdStrike update caused a major internet outage for computers running Microsoft Windows.

CrowdStrike is blaming a bug in an update that allowed its cybersecurity systems to push bad data out to millions of customer computers, setting off last week's global tech outage that grounded flights, took TV broadcasts off air and disrupted banks, hospitals and retailers.