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.
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 | — | Upgrade thunderbird | Aug 5, 2026 | Aug 4, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Aug 18, 2026 | Jul 21, 2026 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefox-esrUpgrade firefox | Jul 29, 2026 | Jul 28, 2026 |
| Mfsa2026 68 | — | Upgrade to Mozilla Firefox version 153.0Upgrade to the latest version of Mozilla Firefox | Jul 21, 2026 | Jul 21, 2026 |
| Mfsa2026 69 | — | Upgrade to Mozilla Firefox ESR version 115.38Upgrade to the latest version of Mozilla Firefox | Jul 21, 2026 | Jul 21, 2026 |
| Mfsa2026 70 | — | Upgrade to Mozilla Firefox ESR version 140.13Upgrade to the latest version of Mozilla Firefox | 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 firefox-debugsourceNo solution existsUpgrade firefox-x11Upgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird | Jul 27, 2026 | Jul 21, 2026 |
| Rocky_linux | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade firefox-x11 | Jul 31, 2026 | Jul 29, 2026 |
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