CVE-2026-5476 NASA cFS整数溢出漏洞

#include <stdio.h> #include <stdint.h> // PoC Concept for Integer Overflow void simulate_vulnerability(uint32_t size_a, uint32_t size_b) { printf("Inputs: %u, %u\n", size_a, size_b); // Vulnerable operation: Integer Overflow on 32-bit system uint32_t total = size_a + size_b; printf("Calculated Total: %u\n", total); // Logic check that can be bypassed if (total < 1024) { printf("[SUCCESS] Logic bypassed via overflow!\n"); } else { printf("[FAIL] Input too large.\n"); } } int main() { printf("--- Normal Case ---\n"); simulate_vulnerability(100, 200); printf("\n--- Exploit Case (Overflow) ---\n"); // 0xFFFFFFF0 + 0x20 = 0x100000110 -> truncated to 0x110 (272) simulate_vulnerability(0xFFFFFFF0, 0x20); return 0; }