CVE-2026-20962

// CVE-2026-20962 PoC - DRTM Uninitialized Resource Information Disclosure // Note: This is a conceptual PoC demonstrating the vulnerability pattern // Actual exploitation requires specific environment and privileged access #include <windows.h> #include <stdio.h> // Simulated DRTM resource access pattern typedef struct _DRTM_CONTEXT { PVOID UninitializedBuffer; // Vulnerable: uninitialized resource ULONG ResourceSize; ULONG Flags; } DRTM_CONTEXT, *PDRTM_CONTEXT; // Trigger DRTM operation with specific conditions BOOL TriggerDRTMVulnerability(PDRTM_CONTEXT Context) { // Attempt to access uninitialized resource // In vulnerable version, this reads uninitialized memory PVOID Data = Context->UninitializedBuffer; // Process and potentially leak the uninitialized data if (Data != NULL) { // Vulnerable code path: uses data without verification printf("[+] Accessing potentially uninitialized resource at %p\n", Data); // Information disclosure through various channels // (e.g., timing differences, error messages, debug output) return TRUE; } return FALSE; } int main() { printf("CVE-2026-20962 DRTM Uninitialized Resource PoC\n"); printf("Requires: High local privileges, DRTM access\n"); printf("Target: Windows DRTM component\n\n"); // This PoC demonstrates the vulnerability pattern // Actual exploitation requires kernel-level access // and specific system state conditions DRTM_CONTEXT ctx; ctx.UninitializedBuffer = NULL; // Uninitialized in vulnerable code ctx.ResourceSize = 0x1000; ctx.Flags = 0; printf("[*] Triggering DRTM operation...\n"); TriggerDRTMVulnerability(&ctx); printf("[!] This PoC is for educational purposes only.\n"); return 0; }

{"cve": {"id": "CVE-2026-20962", "sourceIdentifier": "[email protected]", "published": "2026-01-13T18:16:24.093", "lastModified": "2026-01-14T19:34:12.020", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use of uninitialized resource in Dynamic Root of Trust for Measurement (DRTM) allows an authorized attacker to disclose information locally."}, {"lang": "es", "value": "Uso de recurso no inicializado en Dynamic Root of Trust for Measurement (DRTM) permite a un atacante autorizado divulgar información localmente."}], "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:H/I:N/A:N", "baseScore": 4.4, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-908"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.17763.8276", "matchCriteriaId": "DD4CBDAB-7626-4048-8474-B1BD9C1F3255"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.17763.8276", "matchCriteriaId": "A6D4C631-2CC0-407C-9ACA-7C151006598C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "9CFC3200-1FAB-4AB1-A008-F703EEF3505A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "E481E93D-D86E-4B65-93E5-200327C348C8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.19044.6809", "matchCriteriaId": "F720EC9F-6A33-445F-AFA1-794405737E57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "85E22F96-B552-4BBA-AFA1-85C1FC55DB32"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "5ACD940D-CA6A-402B-B132-E5A66139C44F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*", "versionEndExcluding": "10.0.19045.6809", "matchCriteriaId": "354AD10F-EEF4-461D-BDBB-245B97E3D420"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.22631.6491", "matchCriteriaId": "7D2B0BB9-E94A-420E-8E53-A4C1136DE73E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.22631.6491", "matchCriteriaId": "78C4B71B-5345-4D83-A0A9-A15F783CF9A9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26100.7623", "matchCriteriaId": "208734FD-5175-4856-9D08-ED6CFF64AA14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26100.7623", "matchCriteriaId": "846261D4-ECC2-4DCB-8F8F-F27F8C99F061"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26200.7623", "matchCriteriaId": "33E138A3-968B-4109-AC13-D488685F0AF2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26200.7623", "matchCriteriaId": "CC1FE5A1-3E6E-4606-899B-BF7BF3D3DD8D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.8276", "matchCriteriaId": "A74970A1-CC81-4482-B465-8382B1544EF3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.4648", "matchCriteriaId": "C4AA6991-DE34-48F6-AFD3-77CEE7FBB692"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.25398.2092", "matchCriteriaId": "9738ABD2-1692-4547-B4AF-8673D3F8129C"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26100.32230", "matchCriteriaId": "1BCFDBEF-B7E3-4DE8-BAAC-F648701F6947"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20962", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}