# CVE-2022-34484: Mozilla Thunderbird and 4 others: Use After Free CVE-2022-34484 is fixed in 13 products on 2 platforms, first by Mozilla Firefox ESR (en-US) 102.0, released June 23, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-34484 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.0100 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 30, 2022 - Weakness: CWE-416: Use After Free - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-34484 ## Description The Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. 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 affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 102.0 | [Mozilla Firefox (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-102.0.md) | Jun 27, 2022 | | Windows apps | Mozilla Firefox ESR (en-US) | 102.0 | [Mozilla Firefox ESR (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-102.0.md) | Jun 23, 2022 | | Windows apps | Mozilla Thunderbird (en-US) | 102.0 | [Mozilla Thunderbird (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-102.0.md) | Jun 29, 2022 | | Linux | firefox RHEL 8 | 0:91.11.0-2.el8_6 | [RHSA-2022:5469](https://patchblox.com/security/data/fix/linux/rhsa-2022-5469.md) | Jun 30, 2022 | | Linux | firefox RHEL 9 | 0:91.11.0-2.el9_0 | [RHSA-2022:5481](https://patchblox.com/security/data/fix/linux/rhsa-2022-5481.md) | Jul 1, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 102.0+build2-0ubuntu0.18.04.1 | [firefox 102.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-102.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 102.0+build2-0ubuntu0.20.04.1 | [firefox 102.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-102.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | firefox ol 8 | 0:91.11.0-2.0.1.el8_6 | [ELSA-2022-5469](https://patchblox.com/security/data/fix/linux/elsa-2022-5469.md) | Jul 1, 2022 | | Linux | firefox ol 9 | 0:91.11.0-2.0.1.el9_0 | [ELSA-2022-5481](https://patchblox.com/security/data/fix/linux/elsa-2022-5481.md) | Jul 2, 2022 | | Linux | firefox rocky 8 | 0:91.11.0-2.el8_6 | [RLSA-2022:5469](https://patchblox.com/security/data/fix/linux/rlsa-2022-5469.md) | Jun 30, 2022 | | Linux | firefox-esr Debian 12.15 (bookworm) | 91.11.0esr-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 13.5 (trixie) | 91.11.0esr-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 14 | 91.11.0esr-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 102.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 102.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-102.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 102.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 102.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-102.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 102.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 102.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-102.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 102.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 102.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-102.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:91.11.0-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | thunderbird Debian 13.5 (trixie) | 1:91.11.0-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | thunderbird Debian 14 | 1:91.11.0-1 | [DEBIAN-CVE-2022-34484](https://patchblox.com/security/data/fix/linux/debian-cve-2022-34484.md) | Dec 22, 2022 | | Linux | thunderbird RHEL 8 | 0:91.11.0-2.el8_6 | [RHSA-2022:5470](https://patchblox.com/security/data/fix/linux/rhsa-2022-5470.md) | Jun 30, 2022 | | Linux | thunderbird RHEL 9 | 0:91.11.0-2.el9_0 | [RHSA-2022:5482](https://patchblox.com/security/data/fix/linux/rhsa-2022-5482.md) | Jul 1, 2022 | | Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [thunderbird 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | thunderbird almalinux 9 | 91.11.0-2.el9_0.alma | [ALSA-2022:5482](https://patchblox.com/security/data/fix/linux/alsa-2022-5482.md) | Jul 1, 2022 | | Linux | thunderbird ol 8 | 0:91.11.0-2.0.1.el8_6 | [ELSA-2022-5470](https://patchblox.com/security/data/fix/linux/elsa-2022-5470.md) | Jul 1, 2022 | | Linux | thunderbird ol 9 | 0:91.11.0-2.0.1.el9_0 | [ELSA-2022-5482](https://patchblox.com/security/data/fix/linux/elsa-2022-5482.md) | Jul 2, 2022 | | Linux | thunderbird rocky 8 | 0:91.11.0-2.el8_6 | [RLSA-2022:5470](https://patchblox.com/security/data/fix/linux/rlsa-2022-5470.md) | Jun 30, 2022 | | Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:91.11.0+build2-0ubuntu0.18.04.1 | [xul-ext-lightning 1:91.11.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-91.11.0-build2-0ubuntu0.18.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:91.11.0+build2-0ubuntu0.20.04.1 | [xul-ext-lightning 1:91.11.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-91.11.0-build2-0ubuntu0.20.04.1.md) | Jul 4, 2022 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:91.11.0+build2-0ubuntu0.22.04.1 | [xul-ext-lightning 1:91.11.0+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-91.11.0-build2-0ubuntu0.22.04.1.md) | Jul 4, 2022 | --- Data as of 2026-11-08T19:12:23Z UTC. 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