CVE-2026-9881

Description

Use after free in Bluetooth in Google Chrome on Mac prior to 148.0.7778.216 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)

CVSS Details

CVSS Score

9.0

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.216 (Mac)

PoC / Exploit Code

⚠ For Security Research Only

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

python

// Conceptual PoC for CVE-2026-9881
// Triggering Use After Free in Chrome Bluetooth API

function exploit() {
    // Step 1: Request access to a Bluetooth device to allocate memory
    navigator.bluetooth.requestDevice({
        acceptAllDevices: true,
        optionalServices: ['battery_service']
    }).then(device => {
        console.log('[+] Device connected:', device.id);
        
        // Step 2: Trigger the vulnerable sequence
        // Simulate operations that cause the object to be freed
        // while still retaining a reference in the extension context
        triggerVulnerableFree(device);

        // Step 3: Use After Free
        // Attempt to access the freed memory to corrupt the heap
        // This part attempts to gain code execution
        device.gatt.connect().then(server => {
            // Manipulate the freed object here
            console.log('[*] Attempting to exploit UAF condition...');
            // Hypothetical memory corruption payload
        });
    }).catch(error => {
        console.error('[-] Exploit failed:', error);
    });
}

// Helper to simulate the vulnerable condition
function triggerVulnerableFree(deviceObj) {
    // Specific sequence of API calls required to trigger the bug
    // Implementation depends on internal Chromium logic
    delete deviceObj;
}

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9881
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9881
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9881/
[4] VulDB https://vuldb.com/cve/CVE-2026-9881
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/505140741

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9881", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:46.047", "lastModified": "2026-05-29T16:16:34.497", "vulnStatus": "Undergoing Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Bluetooth in Google Chrome on Mac prior to 148.0.7778.216 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)"}], "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:N/S:C/C:H/I:H/A:H", "baseScore": 9.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 6.0}]}, "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/505140741", "source": "[email protected]"}]}}