Libvpx: Vulnerability in Mozilla Firefox (CVE-2026-2447)
A security update for Mozilla Firefox and related components addresses multiple vulnerabilities including heap buffer overflow, use-after-free, integer overflows, sandbox escapes, privilege escalations, mitigation bypasses, and information disclosure issues. These vulnerabilities affect various Firefox components such as the JavaScript engine, DOM, Audio/Video, Networking, Graphics, and Storage. The update is provided by Red Hat for Firefox versions distributed with Red Hat Enterprise Linux 9.2 and related products. The advisory rates the security impact as Important (high severity).
AI Analysis
Technical Summary
CVE-2026-2447 describes a heap buffer overflow vulnerability in the libvpx component used by Mozilla Firefox and Thunderbird. The vulnerability allows for potential memory corruption leading to high impact on confidentiality, integrity, and availability. Mozilla fixed this issue in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity. Exploitation via Thunderbird email is generally mitigated by disabled scripting, but browser contexts remain vulnerable if unpatched.
Potential Impact
Successful exploitation of this heap buffer overflow can result in complete compromise of confidentiality, integrity, and availability of the affected application. The vulnerability is rated high severity with a CVSS score of 8.8. While Thunderbird's default email reading context mitigates exploitation risk due to disabled scripting, Firefox and browser-like contexts remain at risk if unpatched.
Mitigation Recommendations
Apply the official fixes provided by Mozilla by upgrading to Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, or Thunderbird 147.0.2. These versions contain the official patches that remediate the heap buffer overflow in libvpx. No additional mitigation is required beyond updating to these fixed versions.
Libvpx: Vulnerability in Mozilla Firefox (CVE-2026-2447)
Description
A security update for Mozilla Firefox and related components addresses multiple vulnerabilities including heap buffer overflow, use-after-free, integer overflows, sandbox escapes, privilege escalations, mitigation bypasses, and information disclosure issues. These vulnerabilities affect various Firefox components such as the JavaScript engine, DOM, Audio/Video, Networking, Graphics, and Storage. The update is provided by Red Hat for Firefox versions distributed with Red Hat Enterprise Linux 9.2 and related products. The advisory rates the security impact as Important (high severity).
CVSS v3.1
Score 8.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-2447 describes a heap buffer overflow vulnerability in the libvpx component used by Mozilla Firefox and Thunderbird. The vulnerability allows for potential memory corruption leading to high impact on confidentiality, integrity, and availability. Mozilla fixed this issue in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity. Exploitation via Thunderbird email is generally mitigated by disabled scripting, but browser contexts remain vulnerable if unpatched.
Potential Impact
Successful exploitation of this heap buffer overflow can result in complete compromise of confidentiality, integrity, and availability of the affected application. The vulnerability is rated high severity with a CVSS score of 8.8. While Thunderbird's default email reading context mitigates exploitation risk due to disabled scripting, Firefox and browser-like contexts remain at risk if unpatched.
Mitigation Recommendations
Apply the official fixes provided by Mozilla by upgrading to Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, or Thunderbird 147.0.2. These versions contain the official patches that remediate the heap buffer overflow in libvpx. No additional mitigation is required beyond updating to these fixed versions.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:5231
- Cve Count
- 1
Threat ID: 6a3da1c14853345fc181dd39
Added to database: 06/25/2026, 21:46:41 UTC
Last enriched: 07/15/2026, 15:56:03 UTC
Last updated: 09/10/2026, 19:36:53 UTC
Views: 67
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