Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. 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 was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Aug 5, 2026 | Aug 4, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Aug 18, 2026 | Jul 21, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-esr | Jul 29, 2026 | Jul 28, 2026 |
| Mfsa2026 68 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 153.0 | Jul 21, 2026 | Jul 21, 2026 |
| Mfsa2026 69 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.38 | Jul 21, 2026 | Jul 21, 2026 |
| Mfsa2026 70 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.13 | Jul 21, 2026 | Jul 21, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.13 | Jul 21, 2026 | Jul 21, 2026 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox-x11No solution existsUpgrade firefoxUpgrade firefox-debugsource | Jul 27, 2026 | Jul 21, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird | Jul 31, 2026 | Jul 29, 2026 |
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