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InfoQ · September 27, 2026 · On the brief until October 11, 2026

Google Rewrites Critical C Dependencies to Rust Using AI and Differential Fuzzing

Computer ScienceCybersecurityEngineering
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Translating legacy C code into Rust

Google engineers used Gemini to port the C library giflib into memory-safe Rust, checking the output with differential fuzzing. The drop-in replacement neutralized a zero-day heap write vulnerability and allowed teams to remove process isolation sandboxes without latency penalties. This demonstration provides a pattern for replacing vulnerable C libraries, though engineers still must manually audit foreign function boundaries.

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Instructors can examine whether one-shot model translation demands more human audit effort at interface boundaries than deterministic transpilers.

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