Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Oct 13, 2026 | Sep 29, 2026 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Oct 1, 2026 | Sep 29, 2026 |
| Mfsa2026 100 | — | Upgrade to Mozilla Firefox ESR version 153.4Upgrade to the latest version of Mozilla Firefox | Sep 29, 2026 | Sep 29, 2026 |
| Mfsa2026 98 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.42 | Sep 29, 2026 | Sep 29, 2026 |
| Mfsa2026 99 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.17 | Sep 29, 2026 | Sep 29, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 153.4 | Sep 30, 2026 | Sep 30, 2026 |
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