CVE-2026-7955

Description

Uninitialized Use in GPU in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Medium)

CVSS Details

CVSS Score

5.3

Severity

MEDIUM

CVSS Vector

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

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

Google Chrome < 148.0.7778.96

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
  PoC Concept for CVE-2026-7955
  This is a skeleton demonstrating the GPU interaction context.
  Exploitation requires a renderer exploit to chain with this issue.
-->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2026-7955 PoC Concept</title>
</head>
<body>
    <canvas id="glCanvas" width="640" height="480"></canvas>
    <script>
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl2');

        if (!gl) {
            console.log('WebGL2 not supported');
        }

        // Attempt to trigger GPU memory operations
        // Specific shader or buffer manipulation would be needed to hit the uninitialized bug
        const vertexShaderSource = `
            #version 300 es
            void main() {
                gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
            }
        `;

        const fragmentShaderSource = `
            #version 300 es
            precision highp float;
            out vec4 outColor;
            void main() {
                // Malicious logic to interact with uninitialized memory would go here
                outColor = 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);

        if (vertexShader && fragmentShader) {
            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);
                gl.drawArrays(gl.POINTS, 0, 1);
                console.log('GPU commands executed. Check memory via renderer exploit.');
            }
        }
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7955
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7955
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7955/
[4] VulDB https://vuldb.com/cve/CVE-2026-7955
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/496441232

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7955", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:43.860", "lastModified": "2026-05-07T02:06:16.157", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Uninitialized Use in GPU in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory 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:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-457"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "148.0.7778.96", "matchCriteriaId": "5E9416A8-4333-4195-983C-78F521AF6245"}]}, {"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"}, {"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.html", "source": "[email protected]", "tags": ["Vendor Advisory", "Release Notes"]}, {"url": "https://issues.chromium.org/issues/496441232", "source": "[email protected]", "tags": ["Permissions Required"]}]}}