An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
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 | Aug 28, 2025 | Aug 25, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Sep 9, 2025 | Aug 19, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Aug 22, 2025 | Aug 22, 2025 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefox-esrUpgrade firefox | Dec 10, 2025 | Aug 21, 2025 |
| Mfsa2025 64 | — | Upgrade to Mozilla Firefox version 142.0 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 65 | — | Upgrade to Mozilla Firefox ESR version 115.27 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 66 | — | Upgrade to Mozilla Firefox ESR version 128.14 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 67 | — | Upgrade to Mozilla Firefox ESR version 140.2 | Aug 21, 2025 | Aug 19, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.2 | Aug 22, 2025 | Aug 19, 2025 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade firefox | Aug 26, 2025 | Aug 19, 2025 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceNo solution existsUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefox-x11 | Aug 26, 2025 | Aug 19, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade firefox-debugsourceUpgrade thunderbird-debugsource | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade mozillathunderbirdUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-translations-otherUpgrade mozillafirefoxUpgrade mozillafirefox-develUpgrade mozillathunderbird-translations-commonUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefox-translations-common | Dec 5, 2025 | Aug 29, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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