Mozilla developers and community members reported memory safety bugs present in Firefox 90. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 91.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-firefoxalpine-linux-upgrade-librewolf | Aug 22, 2024 | Aug 17, 2021 | |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | Aug 17, 2021 | |
| Gentoo Linux | gentoo-linux-upgrade-www-client-firefoxgentoo-linux-upgrade-www-client-firefox-bin | Feb 22, 2022 | Aug 17, 2021 | |
| Mfsa2021 33 | mozilla-firefox-upgrade-91_0 | Aug 12, 2021 | Aug 10, 2021 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-mail-thunderbird-91-3-0-11-4-40-0-1-107-1oracle-solaris-11-4-upgrade-web-browser-firefox-91-3-0-11-4-40-0-1-107-1oracle-solaris-11-4-upgrade-web-data-firefox-bookmarks-91-3-0-11-4-40-0-1-107-1 | Dec 13, 2021 | Aug 17, 2021 | |
| Suse | — | suse-upgrade-mozillafirefoxsuse-upgrade-mozillafirefox-branding-slesuse-upgrade-mozillafirefox-branding-sledsuse-upgrade-mozillafirefox-branding-upstreamsuse-upgrade-mozillafirefox-develsuse-upgrade-mozillafirefox-translations-commonsuse-upgrade-mozillafirefox-translations-othersuse-upgrade-rust-cbindgen | Sep 23, 2021 | Aug 11, 2021 |
| Ubuntu | ubuntu-upgrade-firefox | Aug 12, 2021 | Aug 11, 2021 |
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