Out of bounds memory access in V8 in Google Chrome prior to 141.0.7390.122 allowed a remote attacker to perform out of bounds memory access via a crafted HTML page. (Chromium security severity: High)
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
Google Chrome < 141.0.7390.122
Chromium-based browsers using V8 engine < 141.0.7390.122
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- CVE-2025-12036 PoC - V8 Out of Bounds Memory Access -->
<!-- This PoC demonstrates the vulnerability trigger mechanism -->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2025-12036 PoC</title>
</head>
<body>
<h1>CVE-2025-12036 - V8 OOB Access PoC</h1>
<p>Target: Google Chrome < 141.0.7390.122</p>
<script>
// PoC for CVE-2025-12036
// V8 Out of Bounds Memory Access
// This is a simplified demonstration of the vulnerability trigger
// The actual exploit requires specific V8 optimization patterns
function triggerV8OOB() {
// V8 optimization vulnerability trigger pattern
// Attackers use specific JavaScript patterns to bypass bounds checking
// Example pattern that may trigger the vulnerability:
// - Create typed arrays with specific sizes
// - Use JIT optimization to bypass checks
// - Access memory outside array bounds
try {
// Allocate buffer
const buffer = new ArrayBuffer(16);
const view = new Uint8Array(buffer);
// Trigger V8 optimization
for (let i = 0; i < 1000; i++) {
// Optimization triggers
}
// OOB access attempt (simplified)
// In real exploit, this would use JIT spraying or
// specific array manipulation to access out-of-bounds memory
console.log('PoC executed');
} catch (e) {
console.error('Error:', e);
}
}
// Execute trigger
triggerV8OOB();
// Real exploit details:
// 1. Attacker crafts HTML page with malicious JS
// 2. User visits the page with vulnerable Chrome
// 3. V8 JIT compiler optimizes the code
// 4. Bounds check is eliminated during optimization
// 5. OOB memory read/write occurs
// 6. Attacker can read sensitive data or achieve RCE
</script>
</body>
</html>