CVE-2025-14321

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{"bugzilla": {"description": "firefox: Use-after-free in the WebRTC: Signaling component", "id": "2420503", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420503"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-14321", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-09T13:37:53Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-14321\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-14321\nhttps://www.mozilla.org/security/advisories/mfsa2025-94/#CVE-2025-14321"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-20T21:33:48.968526+00:00", "value": {"mitigation_remediation": ["Update Firefox and Thunderbird to versions 146 or newer, or to the ESR releases 140.6 or newer, to apply the vendor fix.", "If an immediate upgrade is not possible, disable WebRTC globally in the browser or email client settings to eliminate use of the vulnerable component.", "As a temporary network\u2011level protection, block WebRTC signaling traffic using firewall rules until the patch can be deployed."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Affected products are Mozilla Firefox and Mozilla Thunderbird, both in their standard releases and ESR branches. The vulnerability was fixed in Firefox 146 and Firefox ESR 140.6, as well as in Thunderbird 146 and Thunderbird ESR 140.6. Users running earlier versions are at risk until they upgrade.", "description_and_impact": "Use\u2011after\u2011free in the WebRTC Signaling component can potentially lead to remote code execution. The flaw arises when the component incorrectly handles reference counting, resulting in an invalid memory access. Vulnerability is classified under CWE\u2011416 and has a CVSS score of 9.8, indicating a high\u2011severity risk. Based on the description, it is inferred that an exploitation could compromise confidentiality, integrity, and availability of the user\u2019s system.", "risk_and_exploitability": "The CVSS score of 9.8 signals a critical threat, but the EPSS score of less than 1% shows that exploitation is currently unlikely. The vulnerability is not listed in CISA KEV, meaning no known active exploits have been catalogued. Based on the description, it is inferred that an attacker could potentially launch an exploit via malicious WebRTC signaling traffic, so the risk remains high for systems that allow untrusted network content."}}}}, "created": "2025-12-10T17:51:14.175579+00:00", "updated": "2026-04-20T21:45:18.959750+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr"]}