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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "7C721868-B6F1-444A-B085-A41C1A11DA2A", "versionEndExcluding": "140.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "9F095AEE-D972-4427-A063-5CA441E4D1A5", "versionEndExcluding": "142.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*", "matchCriteriaId": "1FD80699-54D4-4135-9FB3-93FEC4E7D7DA", "versionEndExcluding": "140.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "matchCriteriaId": "44E5E769-8961-46D3-90E5-DFA27D979F7D", "versionEndExcluding": "142.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2."}, {"lang": "es", "value": "Denegaci\u00f3n de servicio debido a falta de memoria en el componente Gr\u00e1ficos: WebRender. Esta vulnerabilidad afecta a Firefox (versi\u00f3n anterior a 142), Firefox ESR (versi\u00f3n anterior a 140.2), Thunderbird (versi\u00f3n anterior a 142) y Thunderbird (versi\u00f3n anterior a 140.2)."}], "id": "CVE-2025-9182", "lastModified": "2026-04-13T15:17:13.967", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-08-19T21:15:30.650", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking", "Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1975837"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-64/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-67/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-70/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-72/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "firefox: thunderbird: Denial-of-service due to out-of-memory in the Graphics: WebRender component", "id": "2389575", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2389575"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-400", "details": ["'Denial-of-service due to out-of-memory in the Graphics: WebRender component.' This vulnerability affects Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird < 140.2.", "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: Denial-of-service due to out-of-memory in the Graphics: WebRender component."], "name": "CVE-2025-9182", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-08-19T20:33:56Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-9182\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-9182\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=1975837\nhttps://www.mozilla.org/security/advisories/mfsa2025-64/\nhttps://www.mozilla.org/security/advisories/mfsa2025-67/\nhttps://www.mozilla.org/security/advisories/mfsa2025-70/\nhttps://www.mozilla.org/security/advisories/mfsa2025-72/"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Low"}

{"analysis": {"en": {"generated_at": "2026-04-20T16:49:41.070353+00:00", "value": {"mitigation_remediation": ["Update Mozilla Firefox to version 142 or later, or to the ESR 140.2 series, and update Mozilla Thunderbird to version 142 or later, or to the ESR 140.2 series.", "If a timely update cannot be performed, consider disabling the WebRender rendering engine in the browser settings or using an alternative browser to prevent rendering of untrusted content.", "Configure system or browser policies to monitor and isolate rendering processes, and remain vigilant for sudden crashes or freezes that may indicate exploitation."], "summary": {"action": "Immediate Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox and Thunderbird are affected. Any release before Firefox 142 or the ESR 140.2 line, and any Thunderbird release before 142 or the ESR 140.2 line, are vulnerable. The issue specifically impacts the WebRender rendering subsystem used by these products.", "description_and_impact": "The flaw arises when the Graphics: WebRender component can run out of memory during normal operation, causing the browser to become unresponsive or crash. This leads to a denial of service that affects only the affected user's session or machine, but can be exploited by displacing resources. The weakness is identified as an uncontrolled resource consumption issue.", "risk_and_exploitability": "The CVSS score of 7.5 indicates a high impact level. EPSS is below 1%, implying the exploitation probability is low, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is remote, via a malicious web page or email attachment that triggers rendering of complex or malformed graphics content. Requiring the product to process such content will exhaust memory and force a crash, resulting in a service availability loss for the user. No known exploitation of confidentiality or integrity properties is documented."}}}}, "created": "2025-08-21T12:31:43.544377+00:00", "updated": "2026-04-20T17:00:12.728140+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr", "mozilla$PRODUCT$thunderbird"]}