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When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade librewolfUpgrade firefox | Aug 22, 2024 | Jun 24, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 24, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Jul 8, 2021 | Jun 24, 2021 |
| Mfsa2021 23 | — | Upgrade to Mozilla Firefox version 89.0Upgrade to the latest version of Mozilla Firefox | Jun 2, 2021 | Jun 1, 2021 |
| Ubuntu | — | Upgrade firefox | Jun 3, 2021 | Jun 2, 2021 |
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