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{"bugzilla": {"description": "libvpx: Heap buffer overflow in libvpx", "id": "2440219", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440219"}, "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": ["Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-2447", "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": "libvpx", "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:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libvpx", "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:7", "fix_state": "Affected", "package_name": "libvpx", "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:8", "fix_state": "Affected", "package_name": "libvpx", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "thunderbird", "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"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libvpx", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-02-16T14:13:23Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2447\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2447\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=2014390\nhttps://www.mozilla.org/security/advisories/mfsa2026-10/"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,147.0.4)"}}], "product": "firefox", "vendor": "mozilla"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,140.7.1)"}}], "product": "firefox_esr", "vendor": "mozilla"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,115.32.1)"}}], "product": "firefox_esr", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-15T17:10:11.112556+00:00", "value": {"mitigation_remediation": ["Upgrade to the latest versions of Mozilla Firefox and Thunderbird that include the libvpx buffer overflow fix (Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, or Thunderbird 147.0.2).", "After applying the update, restart the affected applications to ensure the updated libvpx library is loaded.", "Until the update can be applied, block or disable the processing of VPX\u2011encoded media content in browsers and mail clients, such as by blocking .vp8/.vp9 files or restricting WebP downloads from untrusted sources."], "summary": {"action": "Immediate Patch", "impact": "Heap buffer overflow potentially enabling remote code execution"}, "threat_synthesis": {"affected_systems": "The affected products are Mozilla Firefox and Mozilla Thunderbird. Versions prior to Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2 are vulnerable. All releases newer than these contain the patch.", "description_and_impact": "A vulnerable heap operation in the libvpx media decoding library allows an attacker to write beyond the intended buffer boundaries. This overflow can corrupt adjacent memory structures, leading to arbitrary code execution or a complete crash. The weakness is a classic Out\u2011of\u2011Bounds Write (CWE\u2011122), which can compromise confidentiality, integrity, and availability if exploited.", "risk_and_exploitability": "The CVSS score of 8.8 classifies this vulnerability as high severity. The EPSS probability is less than 1%, indicating a low likelihood of exploitation at this time, and it is not listed in the CISA KEV catalog. The attack vector is inferred to involve a maliciously crafted VPX media file delivered through a web page or email, as libvpx is used to decode such content in browsers and mail clients."}}}}, "created": "2026-02-17T08:49:37.394311+00:00", "updated": "2026-04-15T17:30:10.460277+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr"]}