CVE-2026-9930

Description

Out of bounds write in Dawn in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome for Mac < 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-2026-9930 (Conceptual)
This HTML page attempts to trigger the OOB write in Dawn via WebGPU.
-->
<html>
<head>
    <title>CVE-2026-9930 PoC</title>
</head>
<body>
<script type="module">
    async function checkVulnerability() {
        if (!navigator.gpu) {
            console.log("WebGPU not supported.");
            return;
        }

        try {
            const adapter = await navigator.gpu.requestAdapter();
            const device = await adapter.requestDevice();

            // Simulate a buffer configuration that might trigger the Dawn OOB write
            // Specific parameters would depend on the internal bug details
            const bufferDescriptor = {
                size: 1024,
                usage: GPUBufferUsage.STORAGE | GPUBufferUsage.COPY_DST,
            };
            
            const buffer = device.createBuffer(bufferDescriptor);
            
            // Malicious command encoding logic would go here
            // This is a placeholder representing the crafted HTML content
            console.log("Buffer created. Attempting to trigger vulnerability...");
            
            // In a real exploit, specific shader code or command buffers would be
            // submitted to cause the out-of-bounds write in the Dawn component.
            
        } catch (error) {
            console.error("An error occurred (expected if crash happens):", error);
        }
    }

    checkVulnerability();
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9930
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9930
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9930/
[4] VulDB https://vuldb.com/cve/CVE-2026-9930
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/501499832

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9930", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:51.090", "lastModified": "2026-05-29T19:16:29.927", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out of bounds write in Dawn in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to perform an out of bounds memory write 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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/501499832", "source": "[email protected]"}]}}