Faulty CrowdStrike update causes major global IT outage, taking out banks, airlines and businesses globally

A widespread global outage on Windows systems was caused by a defective CrowdStrike Falcon content update, triggering blue screen errors across airlines, finance, media, healthcare, and public services; CrowdStrike confirmed no cyberattack, issued a fix, and noted Mac/Linux were unaffected, while Microsoft said its earlier Microsoft 365 issues were unrelated. CISA cautioned that threat actors are exploiting the disruption for phishing, highlighting resilience concerns around mission-critical security updates and their cascading operational impacts worldwide.