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21 Bytes Can Crash FFmpeg: Inside the Vibecoded Fuzzer That Found What Years of Audits Missed

This story is from 2026-08-29. It is preserved in the archive; the latest stories are on the live feed.

Twenty-one bytes. That is the entire attack. A file smaller than a URL, with four zero bytes sitting at exactly the right offset, crashes any FFmpeg-based application that opens it and reads a packet. Not memory corruption, not some exotic heap trick. A division by zero, in code that has been shipp…

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  1. 2026-08-29 03:10 · DEV Community — AI
    21 Bytes Can Crash FFmpeg: Inside the Vibecoded Fuzzer That Found What Years of Audits Missed

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