# CVE-2023-34416: Mozilla Firefox and 4 others: Memory safety bugs present in Firefox 113, Firefox ESR 102.11, and Thunderbird 102.12. CVE-2023-34416 is fixed in 15 products on 2 platforms, first by firefox 114.0+build3-0ubuntu0.20.04.1, released June 6, 2023. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2023-34416 - Priority: Urgent - CVSS: 9.8 (critical) - EPSS: 0.0093 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 6, 2023 - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-34416 ## Description Memory safety bugs present in Firefox 113, Firefox ESR 102.11, and Thunderbird 102.12. 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 Firefox ESR < 102.12, Firefox < 114, and Thunderbird < 102.12. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 114.0.1 | [Mozilla Firefox (en-US) 114.0.1](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-114.0.1.md) | Jun 12, 2023 | | 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) | 115.8.0 | [Mozilla Thunderbird (en-US) 115.8.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-115.8.0.md) | Feb 21, 2024 | | Linux | firefox RHEL 8 | 0:102.12.0-1.el8_8 | [RHSA-2023:3590](https://patchblox.com/security/data/fix/linux/rhsa-2023-3590.md) | Jun 14, 2023 | | Linux | firefox RHEL 9 | 0:102.12.0-1.el9_2 | [RHSA-2023:3589](https://patchblox.com/security/data/fix/linux/rhsa-2023-3589.md) | Jun 14, 2023 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 114.0+build3-0ubuntu0.20.04.1 | [firefox 114.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-114.0-build3-0ubuntu0.20.04.1.md) | Jun 6, 2023 | | Linux | firefox almalinux 8 | 102.12.0-1.el8_8.alma | [ALSA-2023:3590](https://patchblox.com/security/data/fix/linux/alsa-2023-3590.md) | Jun 14, 2023 | | Linux | firefox almalinux 9 | 102.12.0-1.el9_2.alma | [ALSA-2023:3589](https://patchblox.com/security/data/fix/linux/alsa-2023-3589.md) | Jun 14, 2023 | | Linux | firefox ol 8 | 0:102.12.0-1.0.1.el8_8 | [ELSA-2023-3590](https://patchblox.com/security/data/fix/linux/elsa-2023-3590.md) | Jun 15, 2023 | | Linux | firefox ol 9 | 0:102.12.0-1.0.1.el9_2 | [ELSA-2023-3589](https://patchblox.com/security/data/fix/linux/elsa-2023-3589.md) | Jun 17, 2023 | | Linux | firefox rocky 8 | 0:102.12.0-1.el8_8 | [RLSA-2023:3590](https://patchblox.com/security/data/fix/linux/rlsa-2023-3590.md) | Aug 31, 2023 | | Linux | firefox-esr Debian 12.15 (bookworm) | 102.12.0esr-1~deb12u1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | firefox-esr Debian 13.5 (trixie) | 102.12.0esr-1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | firefox-esr Debian 14 | 102.12.0esr-1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 114.0+build3-0ubuntu0.20.04.1 | [firefox-geckodriver 114.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-114.0-build3-0ubuntu0.20.04.1.md) | Jun 6, 2023 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 114.0+build3-0ubuntu0.20.04.1 | [firefox-mozsymbols 114.0+build3-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-114.0-build3-0ubuntu0.20.04.1.md) | Jun 6, 2023 | | Linux | firefox-x11 RHEL 9 | 0:102.12.0-1.el9_2 | [RHSA-2023:3589](https://patchblox.com/security/data/fix/linux/rhsa-2023-3589.md) | Jun 14, 2023 | | Linux | firefox-x11 almalinux 9 | 102.12.0-1.el9_2.alma | [ALSA-2023:3589](https://patchblox.com/security/data/fix/linux/alsa-2023-3589.md) | Jun 14, 2023 | | Linux | firefox-x11 ol 9 | 0:102.12.0-1.0.1.el9_2 | [ELSA-2023-3589](https://patchblox.com/security/data/fix/linux/elsa-2023-3589.md) | Jun 17, 2023 | | Linux | libmozjs-102-0 Ubuntu 22.04.1 LTS (jammy) | 102.12.0-0ubuntu0.22.04.1 | [libmozjs-102-0 102.12.0-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libmozjs-102-0-102.12.0-0ubuntu0.22.04.1.md) | Jun 6, 2023 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:102.12.0-1~deb12u1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | thunderbird Debian 13.5 (trixie) | 1:102.12.0-1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | thunderbird Debian 14 | 1:102.12.0-1 | [DEBIAN-CVE-2023-34416](https://patchblox.com/security/data/fix/linux/debian-cve-2023-34416.md) | Jun 19, 2023 | | Linux | thunderbird RHEL 8 | 0:102.12.0-1.el8_8 | [RHSA-2023:3588](https://patchblox.com/security/data/fix/linux/rhsa-2023-3588.md) | Jun 14, 2023 | | Linux | thunderbird RHEL 9 | 0:102.12.0-1.el9_2 | [RHSA-2023:3587](https://patchblox.com/security/data/fix/linux/rhsa-2023-3587.md) | Jun 14, 2023 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [thunderbird 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [thunderbird 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | | Linux | thunderbird almalinux 8 | 102.12.0-1.el8_8.alma | [ALSA-2023:3588](https://patchblox.com/security/data/fix/linux/alsa-2023-3588.md) | Jun 14, 2023 | | Linux | thunderbird almalinux 9 | 102.12.0-1.el9_2.alma | [ALSA-2023:3587](https://patchblox.com/security/data/fix/linux/alsa-2023-3587.md) | Jun 14, 2023 | | Linux | thunderbird ol 8 | 0:102.12.0-1.0.1.el8_8 | [ELSA-2023-3588](https://patchblox.com/security/data/fix/linux/elsa-2023-3588.md) | Jun 15, 2023 | | Linux | thunderbird ol 9 | 0:102.12.0-1.0.1.el9_2 | [ELSA-2023-3587](https://patchblox.com/security/data/fix/linux/elsa-2023-3587.md) | Jun 17, 2023 | | Linux | thunderbird rocky 8 | 0:102.12.0-1.el8_8 | [RLSA-2023:3588](https://patchblox.com/security/data/fix/linux/rlsa-2023-3588.md) | Jun 24, 2023 | | Linux | thunderbird rocky 9 | 0:102.12.0-1.el9_2 | [RLSA-2023:3587](https://patchblox.com/security/data/fix/linux/rlsa-2023-3587.md) | Jun 24, 2023 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.13.0+build1-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.13.0+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.13.0-build1-0ubuntu0.20.04.1.md) | Jul 5, 2023 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.13.0+build1-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.13.0+build1-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.13.0-build1-0ubuntu0.22.04.1.md) | Jul 5, 2023 | --- Data as of 2026-11-09T01:18:40Z UTC. 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