Delta Air Lines Inc. sued cybersecurity firm CrowdStrike Holdings Inc. over the chaos caused this summer by a “catastrophic” software update that disabled millions of computers worldwide and grounded much of the airline’s passenger fleet.

The airline is alleging gross negligence by the cybersecurity firm. CrowdStrike said Delta is attempting to shift the blame for outdated systems.

Delta Air Lines on Friday sued cybersecurity firm CrowdStrike in a Georgia state court after a global outage in July caused mass flight cancellations, disrupted travel plans of 1.3 million customers and cost the carrier more than $500 million.

Delta Air Lines is suing the cybersecurity firm that has been blamed for causing a global technology outage this summer.

While Delta did not specify an amount that it is seeking from the company, court documents show the airline lost $500 million from flight cancelations, delays

Delta is suing cybersecurity firm CrowdStrike after a July outage caused by a faulty software update led to massive flight cancellations and $500 mill

Delta Air Lines on Friday sued CrowdStrike in a Georgia state court after a global outage in July caused mass flight cancellations.

Delta Air Lines has filed a lawsuit against cybersecurity firm CrowdStrike following a July outage that resulted in over 7,000 flight cancellations and significant financial losses. The airline accuses CrowdStrike of deploying faulty software that led to system crashes and demands compensation for damages and reputational harm.

Delta Air Lines on Friday sued CrowdStrike in a Georgia state court after a global outage in July caused mass flight cancellations, disrupted travel plans of 1.3 million customers and cost the carrier more than $500 million.