CVE-2026-6921

Description

Race in GPU in Google Chrome on Windows prior to 147.0.7727.117 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file. (Chromium security severity: Medium)

CVSS Details

CVSS Score

8.3

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:H/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 < 147.0.7727.117

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!--
PoC Concept: Trigger GPU processing via crafted video
Note: Actual exploit requires a specifically crafted binary video file causing the race condition.
-->
<!DOCTYPE html>
<html>
<body>
    <h1>CVE-2026-6921 PoC Trigger</h1>
    <!-- Embed crafted video to trigger GPU process race condition -->
    <video width="640" height="480" controls autoplay>
        <source src="crafted_exploit_video.mp4" type="video/mp4">
        Your browser does not support the video tag.
    </video>
    <script>
        // Optional: Script interaction to stress GPU if needed
        console.log("Attempting to trigger GPU race condition...");
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-6921
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-6921
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-6921/
[4] VulDB https://vuldb.com/cve/CVE-2026-6921
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_22.html
[6] https://issues.chromium.org/issues/493315759

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-6921", "sourceIdentifier": "[email protected]", "published": "2026-04-23T18:16:30.790", "lastModified": "2026-04-24T16:39:30.307", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Race in GPU in Google Chrome on Windows prior to 147.0.7727.117 allowed a remote attacker to potentially perform a sandbox escape via a crafted video file. (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:C/C:H/I:H/A:H", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.6, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-362"}]}], "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/493315759", "source": "[email protected]", "tags": ["Permissions Required", "Vendor Advisory"]}]}}