# CVE-2022-31747: Mozilla Thunderbird and 4 others: Improper Restriction of Operations within the Bounds of a Memory Buffer CVE-2022-31747 is fixed in 13 products on 2 platforms, first by Mozilla Firefox (en-US) 101.0, released May 31, 2022. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2022-31747 - Priority: High - CVSS: 9.8 (Medium) - EPSS: 0.0094 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 31, 2022 - Weakness: CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-31747 ## Description Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 < 91.10, Firefox < 101, and Firefox ESR < 91.10. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 101.0 | [Mozilla Firefox (en-US) 101.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-101.0.md) | May 31, 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 | 0:91.10.0-1.el8_6 | [RHSA-2022:4872](https://patchblox.com/security/data/fix/linux/rhsa-2022-4872.md) | Jun 1, 2022 | | Linux | firefox RHEL 9 | 0:91.10.0-1.el9_0 | [RHSA-2022:4873](https://patchblox.com/security/data/fix/linux/rhsa-2022-4873.md) | Jun 1, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 101.0.1+build1-0ubuntu0.18.04.1 | [firefox 101.0.1+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-101.0.1-build1-0ubuntu0.18.04.1.md) | May 31, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 101.0.1+build1-0ubuntu0.20.04.1 | [firefox 101.0.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-101.0.1-build1-0ubuntu0.20.04.1.md) | May 31, 2022 | | Linux | firefox ol 8 | 0:91.10.0-1.0.1.el8_6 | [ELSA-2022-4872](https://patchblox.com/security/data/fix/linux/elsa-2022-4872.md) | Jun 2, 2022 | | Linux | firefox ol 9 | 0:91.10.0-1.0.1.el9_0 | [ELSA-2022-4873](https://patchblox.com/security/data/fix/linux/elsa-2022-4873.md) | Jun 30, 2022 | | Linux | firefox rocky 8 | 0:91.10.0-1.el8_6 | [RLSA-2022:4872](https://patchblox.com/security/data/fix/linux/rlsa-2022-4872.md) | Jun 1, 2022 | | Linux | firefox-esr Debian 12.15 (bookworm) | 91.10.0esr-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 13.5 (trixie) | 91.10.0esr-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 14 | 91.10.0esr-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 101.0.1+build1-0ubuntu0.18.04.1 | [firefox-geckodriver 101.0.1+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-101.0.1-build1-0ubuntu0.18.04.1.md) | May 31, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 101.0.1+build1-0ubuntu0.20.04.1 | [firefox-geckodriver 101.0.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-101.0.1-build1-0ubuntu0.20.04.1.md) | May 31, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 101.0.1+build1-0ubuntu0.18.04.1 | [firefox-mozsymbols 101.0.1+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-101.0.1-build1-0ubuntu0.18.04.1.md) | May 31, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 101.0.1+build1-0ubuntu0.20.04.1 | [firefox-mozsymbols 101.0.1+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-101.0.1-build1-0ubuntu0.20.04.1.md) | May 31, 2022 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:91.10.0-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | thunderbird Debian 13.5 (trixie) | 1:91.10.0-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | thunderbird Debian 14 | 1:91.10.0-1 | [DEBIAN-CVE-2022-31747](https://patchblox.com/security/data/fix/linux/debian-cve-2022-31747.md) | Dec 22, 2022 | | Linux | thunderbird RHEL 8 | 0:91.10.0-1.el8_6 | [RHSA-2022:4887](https://patchblox.com/security/data/fix/linux/rhsa-2022-4887.md) | Jun 3, 2022 | | Linux | thunderbird RHEL 9 | 0:91.10.0-1.el9_0 | [RHSA-2022:4892](https://patchblox.com/security/data/fix/linux/rhsa-2022-4892.md) | Jun 3, 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 ol 8 | 0:91.10.0-1.0.1.el8_6 | [ELSA-2022-4887](https://patchblox.com/security/data/fix/linux/elsa-2022-4887.md) | Jun 6, 2022 | | Linux | thunderbird ol 9 | 0:91.10.0-1.0.1.el9_0 | [ELSA-2022-4892](https://patchblox.com/security/data/fix/linux/elsa-2022-4892.md) | Jun 30, 2022 | | Linux | thunderbird rocky 8 | 0:91.10.0-1.el8_6 | [RLSA-2022:4887](https://patchblox.com/security/data/fix/linux/rlsa-2022-4887.md) | Jun 2, 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 2026-11-08T13:06:02Z UTC. 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