On Friday, a problem with the CrowdStrike cybersecurity platform is thought to have caused major airlines to cancel flights and businesses around the world to experience IT outages.
The Federal Aviation Administration’s system status page says that American Airlines, Delta, and United all grounded flights around the world. American said it could resume operations at 5 a.m. Eastern, though.
The financial markets were open, but the London Stock Exchange’s feed for sending out news about companies was down.
In London in the middle of the morning, the FTSE 100 UK:UKX fell 0.5%. Futures on U.S. stocks ES00, -0.05% went down.
CrowdStrike CRWD, -3.35% was popular on the X platform and was blamed for systems crashes at Microsoft companies, such as banks and media companies.
In premarket trade, CrowdStrike shares fell 20%.
“A bug was found in a single content update for Windows hosts,” CEO George Kurtz said in a statement. “CrowdStrike is actively working with customers who have been affected.”
The hosts that run Mac or Linux are not affected. This isn’t a security breach or cyberattack. The problem has been found, confined, and a fix has been put in place.
The most recent security update from CrowdStrike was causing computers running the Microsoft Windows operating system to enter a loop known as the “blue screen of death.”
The price of Microsoft shares MSFT, -0.71% fell by 3%.
