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 firefoxUpgrade thunderbirdUpgrade firefox-x11 | Dec 15, 2025 | Dec 10, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Jan 12, 2026 | Dec 9, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Dec 12, 2025 | Dec 12, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.6 | 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 firefoxUpgrade thunderbirdUpgrade firefox-x11 | Dec 12, 2025 | Dec 9, 2025 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefoxNo solution existsUpgrade thunderbird-debuginfoUpgrade firefox-debugsource | Dec 11, 2025 | Dec 9, 2025 |
| Rocky_linux | — | Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-x11Upgrade firefox-debugsource | Jan 6, 2026 | Jan 5, 2026 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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