CVE-2026-34850 通知服务竞态条件漏洞

#include <stdio.h> #include <pthread.h> #include <unistd.h> // Conceptual PoC for Race Condition in Notification Service // Simulating a TOCTOU (Time-of-Check to Time-of-Use) scenario int shared_resource = 1; void* malicious_thread(void* arg) { while(1) { // Rapidly toggle the resource state to cause inconsistency shared_resource = 0; usleep(100); // Microsecond delay to create window shared_resource = 1; } return NULL; } void* service_thread(void* arg) { while(1) { // Service checks the resource state if (shared_resource == 1) { // Simulate operation assuming state is valid printf("Service operating normally...\n"); } else { // Crash triggered due to unexpected state printf("[!] Service crashed: Race condition detected!\n"); break; } usleep(200); } return NULL; } int main() { pthread_t t1, t2; // Create threads simulating attacker and service pthread_create(&t1, NULL, malicious_thread, NULL); pthread_create(&t2, NULL, service_thread, NULL); pthread_join(t2, NULL); pthread_cancel(t1); return 0; }