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CrowdStrike outage explained: 21 fields, 20 slots, 8.5M blue screens

The CrowdStrike outage of July 19, 2024 is the biggest IT failure most of us have lived through, and its root cause fits in one sentence: a detection template declared 21 input fields, and the code…

  • CrowdStrike outage affected 8.5 million Windows devices globally
  • Single line of code in detection template caused 20 vs 21 field mismatch
  • Outage led to 7,000 flight cancellations and $500M in damages

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