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 | alma-upgrade-firefoxalma-upgrade-firefox-x11alma-upgrade-thunderbird | Aug 28, 2025 | Aug 25, 2025 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-firefoxamazon-linux-ami-2-upgrade-thunderbird | May 20, 2026 | May 20, 2026 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-firefoxamazon-linux-2023-upgrade-firefox-debuginfoamazon-linux-2023-upgrade-firefox-debugsource | Sep 9, 2025 | Aug 19, 2025 | |
| Debian | debian-upgrade-firefox-esrdebian-upgrade-thunderbird | Aug 22, 2025 | Aug 22, 2025 | |
| Freebsd | freebsd-upgrade-package-firefoxfreebsd-upgrade-package-firefox-esrfreebsd-upgrade-package-thunderbird | Dec 10, 2025 | Aug 21, 2025 | |
| Mfsa2025 64 | mozilla-firefox-upgrade-142_0 | Aug 21, 2025 | Aug 19, 2025 | |
| Mfsa2025 65 | mozilla-firefox-esr-upgrade-115_27 | Aug 21, 2025 | Aug 19, 2025 | |
| Mfsa2025 66 | mozilla-firefox-esr-upgrade-128_14 | Aug 21, 2025 | Aug 19, 2025 | |
| Mfsa2025 67 | mozilla-firefox-esr-upgrade-140_2 | Aug 21, 2025 | Aug 19, 2025 | |
| Mozilla Thunderbird | mozilla-thunderbird-upgrade-140_2 | Aug 22, 2025 | Aug 19, 2025 | |
| Oracle_linux | — | oracle-linux-upgrade-firefoxoracle-linux-upgrade-firefox-x11oracle-linux-upgrade-thunderbird | Aug 26, 2025 | Aug 19, 2025 |
| Redhat_linux | redhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-firefox-x11redhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource | Aug 26, 2025 | Aug 19, 2025 | |
| Rocky_linux | rocky-upgrade-firefoxrocky-upgrade-firefox-debuginforocky-upgrade-firefox-debugsourcerocky-upgrade-firefox-x11rocky-upgrade-thunderbirdrocky-upgrade-thunderbird-debuginforocky-upgrade-thunderbird-debugsource | Feb 5, 2026 | Sep 8, 2025 | |
| Suse | — | suse-upgrade-mozillafirefoxsuse-upgrade-mozillafirefox-branding-upstreamsuse-upgrade-mozillafirefox-develsuse-upgrade-mozillafirefox-translations-commonsuse-upgrade-mozillafirefox-translations-othersuse-upgrade-mozillathunderbirdsuse-upgrade-mozillathunderbird-translations-commonsuse-upgrade-mozillathunderbird-translations-other | Dec 5, 2025 | Aug 29, 2025 |
| Ubuntu | ubuntu-upgrade-thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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