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IT Services Circle
IT Services Circle
Aug 5, 2024 · Fundamentals

Ariane 5 Rocket Explosion Caused by a Software Integer‑Overflow Bug

The 1996 Ariane 5 launch failed and exploded due to a single line of legacy code that caused a 64‑bit floating‑point to 16‑bit signed integer conversion overflow in the guidance system, highlighting the dangers of unchecked code reuse, inadequate error handling, and insufficient testing in critical software.

data type conversioninteger overflowrocket failure
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Ariane 5 Rocket Explosion Caused by a Software Integer‑Overflow Bug
DevOps
DevOps
Mar 25, 2016 · Operations

Case Study: The 2005 Mizuho Securities Fat‑Finger Trading Error and Its Legal Aftermath

The 2005 Mizuho Securities “fat‑finger” incident, caused by a trader’s input error and a hidden bug in the Tokyo Stock Exchange’s Fujitsu‑built trading system, led to a ¥400 billion loss, sparking extensive litigation that highlighted responsibilities for software bugs, system testing, and operational risk management.

financial systemslegal caseoperational risk
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Case Study: The 2005 Mizuho Securities Fat‑Finger Trading Error and Its Legal Aftermath