Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
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 |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | May 31, 2026 | May 27, 2026 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | Jun 9, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Jun 9, 2026 | May 19, 2026 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | May 24, 2026 | May 24, 2026 |
| Mfsa2026 46 | — | Upgrade to Mozilla Firefox version 151.0 | May 19, 2026 | May 19, 2026 |
| Mfsa2026 48 | — | Upgrade to Mozilla Firefox ESR version 140.11 | May 19, 2026 | May 19, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.11 | May 20, 2026 | May 19, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | May 29, 2026 | May 19, 2026 |
| Redhat_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade firefox-x11 | Jun 3, 2026 | May 19, 2026 |
| Rocky_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox-x11Upgrade thunderbird-debuginfo | Jun 1, 2026 | May 29, 2026 |
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