# CVE-2022-3266: Mozilla Thunderbird and 4 others: Out-of-bounds Read CVE-2022-3266 is fixed in 13 products on 2 platforms, first by Mozilla Thunderbird (en-US) 102.3.0, released September 14, 2022. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2022-3266 - Priority: Routine - CVSS: 5.5 (Important) - EPSS: 0.0030 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 23, 2022 - Weakness: CWE-125: Out-of-bounds Read - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-3266 ## Description An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 105.0 | [Mozilla Firefox (en-US) 105.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-105.0.md) | Sep 21, 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 | 0:102.3.0-6.el8_6 | [RHSA-2022:6702](https://patchblox.com/security/data/fix/linux/rhsa-2022-6702.md) | Sep 26, 2022 | | Linux | firefox RHEL 9 | 0:102.3.0-6.el9_0 | [RHSA-2022:6700](https://patchblox.com/security/data/fix/linux/rhsa-2022-6700.md) | Sep 26, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 105.0+build2-0ubuntu0.18.04.1 | [firefox 105.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-105.0-build2-0ubuntu0.18.04.1.md) | Sep 27, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 105.0+build2-0ubuntu0.20.04.1 | [firefox 105.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-105.0-build2-0ubuntu0.20.04.1.md) | Sep 27, 2022 | | Linux | firefox-esr Debian 11.6 (bullseye) | 102.3.0esr-1~deb11u1 | [DSA-5237-1](https://patchblox.com/security/data/fix/linux/dsa-5237-1.md) | Sep 23, 2022 | | Linux | firefox-esr Debian 12.15 (bookworm) | 102.3.0esr-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 13.5 (trixie) | 102.3.0esr-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 14 | 102.3.0esr-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 105.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 105.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-105.0-build2-0ubuntu0.18.04.1.md) | Sep 27, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 105.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 105.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-105.0-build2-0ubuntu0.20.04.1.md) | Sep 27, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 105.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 105.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-105.0-build2-0ubuntu0.18.04.1.md) | Sep 27, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 105.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 105.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-105.0-build2-0ubuntu0.20.04.1.md) | Sep 27, 2022 | | Linux | thunderbird Debian 11.6 (bullseye) | 1:102.3.0-1~deb11u1 | [DSA-5238-1](https://patchblox.com/security/data/fix/linux/dsa-5238-1.md) | Sep 27, 2022 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:102.3.0-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | thunderbird Debian 13.5 (trixie) | 1:102.3.0-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | thunderbird Debian 14 | 1:102.3.0-1 | [DEBIAN-CVE-2022-3266](https://patchblox.com/security/data/fix/linux/debian-cve-2022-3266.md) | Dec 22, 2022 | | Linux | thunderbird RHEL 8 | 0:102.3.0-3.el8_6 | [RHSA-2022:6708](https://patchblox.com/security/data/fix/linux/rhsa-2022-6708.md) | Sep 26, 2022 | | Linux | thunderbird RHEL 9 | 0:102.3.0-3.el9_0 | [RHSA-2022:6717](https://patchblox.com/security/data/fix/linux/rhsa-2022-6717.md) | Sep 26, 2022 | | Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [thunderbird 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [thunderbird 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [thunderbird 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:102.4.2+build2-0ubuntu0.18.04.1 | [xul-ext-lightning 1:102.4.2+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-102.4.2-build2-0ubuntu0.18.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.4.2+build2-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.4.2+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.4.2-build2-0ubuntu0.20.04.1.md) | Oct 26, 2022 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.4.2+build2-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.4.2+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.4.2-build2-0ubuntu0.22.04.1.md) | Oct 26, 2022 | --- Data as of 2026-11-08T00:53:09Z UTC. 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