Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Dec 15, 2025 | Dec 10, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Jan 12, 2026 | Dec 9, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Dec 12, 2025 | Dec 12, 2025 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-esr | Jan 27, 2026 | Dec 11, 2025 |
| Mfsa2025 92 | — | Upgrade to Mozilla Firefox version 146.0Upgrade to the latest version of Mozilla Firefox | Dec 10, 2025 | Dec 9, 2025 |
| Mfsa2025 94 | — | Upgrade to Mozilla Firefox ESR version 140.6Upgrade to the latest version of Mozilla Firefox | Dec 10, 2025 | Dec 9, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.6 | Dec 11, 2025 | Dec 9, 2025 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Dec 12, 2025 | Dec 9, 2025 |
| Redhat_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird-debugsourceNo solution exists | Dec 11, 2025 | Dec 9, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Jan 6, 2026 | Jan 5, 2026 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub