CVE-2025-68968

// CVE-2025-68968 PoC - Double Free in Huawei Multi-mode Input Module // This PoC demonstrates the double free vulnerability pattern // Note: Actual exploitation requires specific trigger conditions #include <stdio.h> #include <stdlib.h> #include <string.h> /* Simulated input module structure */ typedef struct { char* input_buffer; size_t buffer_size; int mode; } InputModule; /* Vulnerable function - simulates the double free condition */ void process_input_vulnerable(InputModule* module, char* user_input) { // First allocation module->input_buffer = malloc(256); if (module->input_buffer == NULL) { return; } // Copy user input strncpy(module->input_buffer, user_input, 255); module->input_buffer[255] = '\0'; // First free - normal operation free(module->input_buffer); // BUG: Pointer not set to NULL after free // module->input_buffer = NULL; // This line is missing // In certain code paths, the buffer might be freed again // causing a double free vulnerability // Example trigger condition if (module->mode == 0) { // Error handling path might free the same buffer again free(module->input_buffer); // DOUBLE FREE HERE } } /* Safe version with proper nullification */ void process_input_safe(InputModule* module, char* user_input) { // First allocation module->input_buffer = malloc(256); if (module->input_buffer == NULL) { return; } // Copy user input strncpy(module->input_buffer, user_input, 255); module->input_buffer[255] = '\0'; // First free free(module->input_buffer); // FIX: Set pointer to NULL after free module->input_buffer = NULL; // Now safe to call free again (will be a no-op) if (module->mode == 0) { free(module->input_buffer); // Safe: free(NULL) is a no-op } } int main() { printf("CVE-2025-68968 Double Free Vulnerability PoC\n"); printf("Target: Huawei Multi-mode Input Module\n\n"); // Trigger the vulnerability InputModule module = {0}; module.mode = 0; // Set to trigger condition process_input_vulnerable(&module, "test input"); printf("Double free triggered - memory corruption possible\n"); return 0; }

{"cve": {"id": "CVE-2025-68968", "sourceIdentifier": "[email protected]", "published": "2026-01-14T03:15:51.740", "lastModified": "2026-01-15T16:45:39.850", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Double free vulnerability in the multi-mode input module.\nImpact: Successful exploitation of this vulnerability may affect the input function."}, {"lang": "es", "value": "Vulnerabilidad de doble liberación en el módulo de entrada multimodo.\nImpacto: La explotación exitosa de esta vulnerabilidad puede afectar la función de entrada."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-415"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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/2026/1//", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://consumer.huawei.com/en/support/bulletinlaptops/2026/1//", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}