SongT-50

## minimal-test-case-report.md

      
        
          
            
              
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                SongT-50
                / minimal-test-case-report.md
            
            
              Created
              May 7, 2026 05:16
            
              
                protobuf-c PR #800 mock files (size_t->unsigned narrowing arithmetic reproducer)
              
          
        
      
        

      
      
    protobuf-c size_t→unsigned truncation: Minimal Test Case

Created: 2026-05-02

For: Robert Edmonds (protobuf-c maintainer)

Re: GitHub PR #800 verification request
Executive Summary

This document provides a minimal test case for the size_t→unsigned truncation issue reported in PR #800. The vulnerability exists at protobuf-c.c:3244 where repeated-field element counts are truncated from size_t to unsigned during the allocation phase.