CVE-2026-44927 uriparser指针截断漏洞

#include <stdio.h> #include <stdlib.h> #include <stdint.h> // Simulate the pointer difference truncation vulnerability void vulnerable_function(char* start, char* end) { // Vulnerability: Casting pointer difference (ptrdiff_t/size_t) to int int diff = (int)(end - start); printf("Actual pointer difference: %ld\n", end - start); printf("Truncated int value: %d\n", diff); if (diff > 0) { // Potential misuse of the truncated value leading to logic error or memory issue printf("Processing %d bytes based on truncated value.\n", diff); } } int main() { // Allocate a buffer larger than INT_MAX to trigger truncation on 64-bit systems size_t size = (size_t)1 << 31; // 2GB char* buffer = (char*)malloc(size); if (buffer) { vulnerable_function(buffer, buffer + size); free(buffer); } else { printf("Memory allocation failed.\n"); } return 0; }