Cfir Aguston

@Cfiraguston

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Joined October 2025

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Experienced software engineering manager passionate about embedded systems, tech history and software education.

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Cfir Aguston's blogs

The Software Chroniclescfiraguston.hashnode.dev5 posts

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Recently published

CACfir Agustoncfiraguston.hashnode.devOct 14, 2025 · 2 min read

When Floating-Point Failed Catastrophically

IEEE-754 gave us a common way to handle decimals on computers. But even with a standard, tiny numeric mistakes can grow into big failures. Here are four famous ones. 1) The Patriot Missile Failure (1991) A U.S. Patriot missile system failed to interc...

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CACfir Agustoncfiraguston.hashnode.devOct 14, 2025 · 1 min read

Oops I goto It Again

Back in 2014, Apple’s SSL code had a tiny flaw: just one extra goto fail; line, that broke secure connections. On a public Wi-Fi, your iPhone’s “lock” icon could lie. That duplicated goto made a security check skip critical steps. Attackers could int...

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CACfir Agustoncfiraguston.hashnode.devOct 14, 2025 · 1 min read

The Car That Would Not Stop

In 2009, a Lexus suddenly started speeding on a California highway. The driver, off-duty police officer Mark Saylor, called 911. “We can’t stop… we’re going 120…” Moments later, the car crashed. Everyone inside was killed. At first, Toyota blamed f...

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CACfir Agustoncfiraguston.hashnode.devOct 14, 2025 · 1 min read

The Forbidden Intel Opcode That Melts CPUs

In the 1990s, a strange bug in Intel’s Pentium processors caused real panic. A few bytes of machine code, F0 0F C7 C8, could completely freeze the CPU. No error message. No reboot. No recovery. The system just died. This flaw became known as the F00F...

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CACfir Agustoncfiraguston.hashnode.devOct 10, 2025 · 2 min read

Statement Coverage Is Not Enough

Every now and then, I see someone say they’ve stopped caring about coverage metrics or that “50% coverage is good enough” (or other arbitrary number). But I think a major point is being missed. Coverage isn’t just a number. It’s a way to understand h...

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Cfir Aguston

About

Available for

Cfir Aguston's blogs

Recently published

When Floating-Point Failed Catastrophically

Oops I goto It Again

The Car That Would Not Stop

The Forbidden Intel Opcode That Melts CPUs

Statement Coverage Is Not Enough

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Cfir Aguston

About

Available for

Cfir Aguston's blogs

Recently published

When Floating-Point Failed Catastrophically

Oops I goto It Again

The Car That Would Not Stop

The Forbidden Intel Opcode That Melts CPUs

Statement Coverage Is Not Enough