Google Replaces Critical C Dependencies with AI-Translated Rust

Google's security team has successfully rewritten critical C dependencies to Rust using AI and differential fuzzing. The initiative focused on giflib, an image-processing library with about 3,000 lines of code that often decodes untrusted user input without sandboxing.

The team applied a three-stage automated migration process designed around an autonomous feedback loop. Gemini was used to translate the complete logic of the C library into Rust, retaining the original exported symbols and struct definitions.

Automated differential testing engines detected behavioural discrepancies and fed the failure traces back to the model for iterative patch synthesis.