# CVE-2022-38478: Mozilla Thunderbird and 4 others: Out-of-bounds Write CVE-2022-38478 is fixed in 13 products on 2 platforms, first by firefox 104.0+build3-0ubuntu0.18.04.1, released August 23, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-38478 - Priority: High - CVSS: 8.8 (Important) - EPSS: 0.0094 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Aug 23, 2022 - Weakness: CWE-787: Out-of-bounds Write - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-38478 ## Description Members the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103, Firefox ESR 102.1, and Firefox ESR 91.12. 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 Thunderbird < 102.2, Thunderbird < 91.13, Firefox ESR < 91.13, Firefox ESR < 102.2, and Firefox < 104. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 104.0 | [Mozilla Firefox (en-US) 104.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-104.0.md) | Aug 24, 2022 | | Windows apps | Mozilla Firefox ESR (en-US) | 115.4.0 | [Mozilla Firefox ESR (en-US) 115.4.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-115.4.0.md) | Oct 17, 2023 | | Windows apps | Mozilla Thunderbird (en-US) | 102.3.0 | [Mozilla Thunderbird (en-US) 102.3.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-102.3.0.md) | Sep 14, 2022 | | Linux | firefox RHEL 8 | 0:91.13.0-1.el8_6 | [RHSA-2022:6175](https://patchblox.com/security/data/fix/linux/rhsa-2022-6175.md) | Aug 24, 2022 | | Linux | firefox RHEL 9 | 0:91.13.0-1.el9_0 | [RHSA-2022:6174](https://patchblox.com/security/data/fix/linux/rhsa-2022-6174.md) | Aug 24, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 104.0+build3-0ubuntu0.18.04.1 | [firefox 104.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-104.0-build3-0ubuntu0.18.04.1.md) | Aug 23, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 104.0+build3-0ubuntu0.20.04.1 | [firefox 104.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-104.0-build3-0ubuntu0.20.04.1.md) | Aug 23, 2022 | | Linux | firefox almalinux 8 | 91.13.0-1.el8_6.alma | [ALSA-2022:6175](https://patchblox.com/security/data/fix/linux/alsa-2022-6175.md) | Aug 24, 2022 | | Linux | firefox almalinux 9 | 91.13.0-1.el9_0.alma | [ALSA-2022:6174](https://patchblox.com/security/data/fix/linux/alsa-2022-6174.md) | Aug 24, 2022 | | Linux | firefox ol 8 | 0:91.13.0-1.0.1.el8_6 | [ELSA-2022-6175](https://patchblox.com/security/data/fix/linux/elsa-2022-6175.md) | Aug 25, 2022 | | Linux | firefox ol 9 | 0:91.13.0-1.0.1.el9_0 | [ELSA-2022-6174](https://patchblox.com/security/data/fix/linux/elsa-2022-6174.md) | Aug 25, 2022 | | Linux | firefox rocky 8 | 0:91.13.0-1.el8_6 | [RLSA-2022:6175](https://patchblox.com/security/data/fix/linux/rlsa-2022-6175.md) | Aug 24, 2022 | | Linux | firefox-esr Debian 12.15 (bookworm) | 102.2.0esr-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 13.5 (trixie) | 102.2.0esr-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 14 | 102.2.0esr-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 104.0+build3-0ubuntu0.18.04.1 | [firefox-geckodriver 104.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-104.0-build3-0ubuntu0.18.04.1.md) | Aug 23, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 104.0+build3-0ubuntu0.20.04.1 | [firefox-geckodriver 104.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-104.0-build3-0ubuntu0.20.04.1.md) | Aug 23, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 104.0+build3-0ubuntu0.18.04.1 | [firefox-mozsymbols 104.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-104.0-build3-0ubuntu0.18.04.1.md) | Aug 23, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 104.0+build3-0ubuntu0.20.04.1 | [firefox-mozsymbols 104.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-104.0-build3-0ubuntu0.20.04.1.md) | Aug 23, 2022 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:102.2.0-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | thunderbird Debian 13.5 (trixie) | 1:102.2.0-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | thunderbird Debian 14 | 1:102.2.0-1 | [DEBIAN-CVE-2022-38478](https://patchblox.com/security/data/fix/linux/debian-cve-2022-38478.md) | Dec 22, 2022 | | Linux | thunderbird RHEL 8 | 0:91.13.0-1.el8_6 | [RHSA-2022:6164](https://patchblox.com/security/data/fix/linux/rhsa-2022-6164.md) | Aug 24, 2022 | | Linux | thunderbird RHEL 9 | 0:91.13.0-1.el9_0 | [RHSA-2022:6165](https://patchblox.com/security/data/fix/linux/rhsa-2022-6165.md) | Aug 24, 2022 | | Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [thunderbird 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [thunderbird 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [thunderbird 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | | Linux | thunderbird almalinux 8 | 91.13.0-1.el8_6.alma | [ALSA-2022:6164](https://patchblox.com/security/data/fix/linux/alsa-2022-6164.md) | Aug 24, 2022 | | Linux | thunderbird almalinux 9 | 91.13.0-1.el9_0.alma | [ALSA-2022:6165](https://patchblox.com/security/data/fix/linux/alsa-2022-6165.md) | Aug 24, 2022 | | Linux | thunderbird ol 8 | 0:91.13.0-1.0.1.el8_6 | [ELSA-2022-6164](https://patchblox.com/security/data/fix/linux/elsa-2022-6164.md) | Aug 25, 2022 | | Linux | thunderbird ol 9 | 0:91.13.0-1.0.1.el9_0 | [ELSA-2022-6165](https://patchblox.com/security/data/fix/linux/elsa-2022-6165.md) | Aug 25, 2022 | | Linux | thunderbird rocky 8 | 0:91.13.0-1.el8_6 | [RLSA-2022:6164](https://patchblox.com/security/data/fix/linux/rlsa-2022-6164.md) | Aug 24, 2022 | | Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:102.2.2+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:102.2.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-102.2.2-build1-0ubuntu0.18.04.1.md) | Aug 31, 2022 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.2.2+build1-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.2.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.2.2-build1-0ubuntu0.20.04.1.md) | Dec 22, 2022 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.2.2+build1-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.2.2+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.2.2-build1-0ubuntu0.22.04.1.md) | Dec 22, 2022 | --- Data as of 2026-11-08T13:06:02Z UTC. 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