Use after free in Base in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical)
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 < 146.0.7680.153
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- Proof of Concept for CVE-2026-4441 (Conceptual Example) -->
<!-- This demonstrates the logic flow of a Use-After-Free in a browser context -->
<html>
<head>
<script>
function triggerUAF() {
// Step 1: Instantiate a vulnerable object (Simulated Base component object)
let targetObject = new VulnerableObject();
// Step 2: Manipulate the object to prepare the memory state
targetObject.prepare();
// Step 3: Trigger the memory free operation
// The object is destroyed, but the reference might remain in some internal cache
targetObject = null;
// Step 4: Force Garbage Collection to attempt to clear memory
if (window.gc) {
window.gc();
}
// Step 5: Attempt to reuse the freed memory (The UAF trigger)
// If the browser does not nullify the reference correctly,
// accessing the 'data' property here causes the crash or corruption.
try {
console.log("Attempting to access freed memory...");
// In a real exploit, this memory area would be sprayed with ROP gadgets
exploitMemory();
} catch (e) {
console.log("UAF Trigger failed or handled: " + e.message);
}
}
// Mock function representing the vulnerable class
function VulnerableObject() {
this.data = new ArrayBuffer(0x100);
this.prepare = function() { /* Setup logic */ };
}
// Mock function representing the exploitation attempt
function exploitMemory() {
// Malicious activity would go here
}
window.onload = function() {
document.getElementById('status').innerText = 'Page loaded. Triggering logic...';
setTimeout(triggerUAF, 1000);
};
</script>
</head>
<body>
<h1>CVE-2026-4441 PoC Test</h1>
<div id="status">Loading...</div>
<p>Open the developer console to observe execution.</p>
</body>
</html>