CVE-2025-20772

// CVE-2025-20772 PoC Concept (Requires System Privilege) // This is a conceptual demonstration - actual exploitation requires specific MediaTek device environment /* #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated display buffer structure struct display_buffer { void* data; size_t size; int ref_count; }; // Vulnerable function demonstrating UAF condition void process_display_buffer(struct display_buffer* buf) { if (buf == NULL) return; // Free the buffer without clearing reference if (buf->ref_count <= 0) { free(buf->data); free(buf); // UAF: buf is freed but pointer may still be used } // Later access to freed memory - vulnerable code path if (buf->size > 0) { // Accessing freed memory memcpy(buf->data, "malicious_data", 14); } } // Heap spray attempt (simplified) void heap_spray_attempt() { // In real scenario: allocate many objects to control heap layout // Then trigger free followed by reuse printf("[*] Attempting heap layout control...\n"); // Allocate objects to fill heap for (int i = 0; i < 1000; i++) { void* ptr = malloc(256); if (ptr) { memset(ptr, 0x41, 256); // Fill with controllable data } } printf("[*] Heap layout manipulation complete\n"); } int main() { printf("CVE-2025-20772 MediaTek Display UAF PoC\n"); printf("Note: Actual exploitation requires: \n"); printf(" - MediaTek device with vulnerable display driver\n"); printf(" - System-level privileges already obtained\n"); printf(" - Knowledge of kernel heap layout\n"); heap_spray_attempt(); // Create and process vulnerable buffer struct display_buffer* buf = malloc(sizeof(struct display_buffer)); buf->data = malloc(1024); buf->size = 1024; buf->ref_count = 0; // Trigger UAF condition process_display_buffer(buf); printf("[*] UAF condition triggered - vulnerability present\n"); return 0; } */ // Note: This PoC is conceptual. Real exploitation requires: // 1. Physical or local access to MediaTek device // 2. System privileges already obtained // 3. Understanding of specific display driver implementation // 4. Ability to control kernel heap allocation patterns

{"cve": {"id": "CVE-2025-20772", "sourceIdentifier": "[email protected]", "published": "2025-12-02T03:16:18.767", "lastModified": "2026-01-12T09:15:50.820", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In display, there is a possible memory corruption due to use after free. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10182914; Issue ID: MSV-4795."}, {"lang": "es", "value": "En la pantalla, hay una posible corrupción de memoria debido a un uso después de liberar. Esto podría llevar a una escalada local de privilegios si un actor malintencionado ya ha obtenido los privilegios del Sistema. No se necesita interacción del usuario para la explotación. ID del parche: ALPS10196993; ID del problema: MSV-4801."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}, {"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*", "matchCriteriaId": "2700BCC5-634D-4EC6-AB67-5B678D5F951D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:*:*:*:*:*:*:*", "matchCriteriaId": "2D49E611-5D53-479D-A981-42388FDC0E8D"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt2718:-:*:*:*:*:*:*:*", "matchCriteriaId": "F5506327-7DDF-4E88-9EA8-10B8E32F848B"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6739:-:*:*:*:*:*:*:*", "matchCriteriaId": "7FA8A390-9F52-4CF3-9B45-936CE3E2B828"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6761:-:*:*:*:*:*:*:*", "matchCriteriaId": "F726F486-A86F-4215-AD93-7A07A071844A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6765:-:*:*:*:*:*:*:*", "matchCriteriaId": "43E779F6-F0A0-4153-9A1D-B715C3A2F80E"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6768:-:*:*:*:*:*:*:*", "matchCriteriaId": "06CD97E1-8A76-48B4-9780-9698EF5A960F"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6781:-:*:*:*:*:*:*:*", "matchCriteriaId": "C4EEE021-6B2A-47A0-AC6B-55525A40D718"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6789:-:*:*:*:*:*:*:*", "matchCriteriaId": "8B9B0D82-82C1-4A77-A016-329B99C45F49"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6833:-:*:*:*:*:*:*:*", "matchCriteriaId": "9814939B-F05E-4870-90C0-7C0F6BAAEB39"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6835:-:*:*:*:*:*:*:*", "matchCriteriaId": "19A63103-C708-48EC-B44D-5E465A6B79C5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6853:-:*:*:*:*:*:*:*", "matchCriteriaId": "366F1912-756B-443E-9962-224937DD7DFB"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6855:-:*:*:*:*:*:*:*", "matchCriteriaId": "89AFEE24-7AAD-4EDB-8C3E-EDBA3240730A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877:-:*:*:*:*:*:*:*", "matchCriteriaId": "7CA9352F-E9BD-4656-9B7C-4AFEE2C78E58"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6878:-:*:*:*:*:*:*:*", "matchCriteriaId": "855A8046-34ED-4891-ACE5-76AB10AC8D53"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6879:-:*:*:*:*:*:*:*", "matchCriteriaId": "704BE5CE-AE08-4432-A8B0-4C8BD62148AD"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6883:-:*:*:*:*:*:*:*", "matchCriteriaId": "15E2EC3F-9FB3-488B-B1C1-2793A416C755"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6885:-:*:*:*:*:*:*:*", "matchCriteriaId": "DD64413C-C774-4C4F-9551-89E1AA9469EE"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6886:-:*:*:*:*:*:*:*", "matchCriteriaId": "AF3E2B84-DAFE-4E11-B23B-026F719475F5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6889:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B787DC3-8E5A-4968-B20B-37B6257FAAE2"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6893:-:*:*:*:*:*:*:*", "matchCriteriaId": "213B5C7F-D965-4312-9CDF-4F06FA77D401"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6895:-:*:*:*:*:*:*:*", "matchCriteriaId": "E0CA45C9-7BFE-4C93-B2AF-B86501F763AB"}, {"vulnerable": false, ... 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