CVE-2025-66320

// CVE-2025-66320 PoC - Race Condition in Camera Framework // This PoC demonstrates triggering race condition in camera framework module #include <pthread.h> #include <stdio.h> #include <unistd.h> // Simulated camera framework structures typedef struct { void* frame_buffer; int status; int ref_count; } camera_context_t; camera_context_t* cam_ctx = NULL; pthread_mutex_t cam_mutex = PTHREAD_MUTEX_INITIALIZER; // Vulnerable function - missing proper synchronization void* camera_worker_thread(void* arg) { int thread_id = *(int*)arg; for (int i = 0; i < 1000; i++) { // Race condition: non-atomic read-modify-write if (cam_ctx != NULL) { // Simulate TOCTOU race condition int old_count = cam_ctx->ref_count; // Read usleep(1); // Time window for race cam_ctx->ref_count = old_count + 1; // Modify-Write // Simulate buffer access race if (cam_ctx->frame_buffer != NULL) { // Concurrent access without lock memset(cam_ctx->frame_buffer, thread_id, 64); } } } return NULL; } // Trigger function void trigger_camera_race() { pthread_t threads[4]; int thread_ids[4] = {0, 1, 2, 3}; // Initialize camera context cam_ctx = (camera_context_t*)malloc(sizeof(camera_context_t)); cam_ctx->frame_buffer = malloc(1024); cam_ctx->status = 1; cam_ctx->ref_count = 0; printf("Starting race condition PoC for CVE-2025-66320\n"); // Create multiple threads to trigger race for (int i = 0; i < 4; i++) { pthread_create(&threads[i], NULL, camera_worker_thread, &thread_ids[i]); } // Wait for threads to complete for (int i = 0; i < 4; i++) { pthread_join(threads[i], NULL); } printf("Final ref_count: %d (expected: 4000)\n", cam_ctx->ref_count); printf("Race condition may cause inconsistent ref_count values\n"); free(cam_ctx->frame_buffer); free(cam_ctx); } int main() { trigger_camera_race(); return 0; } /* * Mitigation: * 1. Add proper mutex locks around shared resource access * 2. Use atomic operations for reference counting * 3. Implement double-checked locking pattern * 4. Add memory barriers for multi-core systems */

{"cve": {"id": "CVE-2025-66320", "sourceIdentifier": "[email protected]", "published": "2025-12-08T08:15:52.900", "lastModified": "2025-12-09T20:29:04.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Multi-thread race condition vulnerability in the camera framework module. Impact: Successful exploitation of this vulnerability may affect availability."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 4.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 4.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.0, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-362"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:huawei:harmonyos:5.0.1:*:*:*:*:*:*:*", "matchCriteriaId": "738D803A-C4CE-477B-BC89-CE47351C0A84"}, {"vulnerable": true, "criteria": "cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*", "matchCriteriaId": "E39DE6A6-CBE6-4086-93CD-113D1B3BA730"}, {"vulnerable": true, "criteria": "cpe:2.3:o:huawei:harmonyos:6.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "0EBE30DD-E146-4A6A-BE68-DEF9D4D0B2A8"}]}]}], "references": [{"url": "https://consumer.huawei.com/en/support/bulletin/2025/12/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}