# CVE-2023-23605: Memory safety bugs fixed in Firefox 109 and Firefox ESR 102.7 CVE-2023-23605 is fixed in 13 products on 2 platforms, first by Mozilla Firefox (en-US) 109.0, released January 17, 2023. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2023-23605 - Priority: High - CVSS: 8.8 (Important) - EPSS: 0.0070 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jan 17, 2023 - Weakness: CWE-787: Out-of-bounds Write - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-23605 ## Description Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 108 and Firefox ESR 102.6. 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 < 109, Firefox ESR < 102.7, and Thunderbird < 102.7. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 109.0 | [Mozilla Firefox (en-US) 109.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-109.0.md) | Jan 17, 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 | 0:102.7.0-1.el8_7 | [RHSA-2023:0288](https://patchblox.com/security/data/fix/linux/rhsa-2023-0288.md) | Jan 23, 2023 | | Linux | firefox RHEL 9 | 0:102.7.0-1.el9_1 | [RHSA-2023:0285](https://patchblox.com/security/data/fix/linux/rhsa-2023-0285.md) | Jan 23, 2023 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 109.0+build2-0ubuntu0.18.04.1 | [firefox 109.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-109.0-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 109.0+build2-0ubuntu0.20.04.1 | [firefox 109.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-109.0-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | firefox almalinux 8 | 102.7.0-1.el8_7.alma | [ALSA-2023:0288](https://patchblox.com/security/data/fix/linux/alsa-2023-0288.md) | Jan 23, 2023 | | Linux | firefox almalinux 9 | 102.7.0-1.el9_1.alma | [ALSA-2023:0285](https://patchblox.com/security/data/fix/linux/alsa-2023-0285.md) | Jan 23, 2023 | | Linux | firefox ol 8 | 0:102.7.0-1.0.1.el8_7 | [ELSA-2023-0288](https://patchblox.com/security/data/fix/linux/elsa-2023-0288.md) | Jan 24, 2023 | | Linux | firefox ol 9 | 0:102.7.0-1.0.1.el9_1 | [ELSA-2023-0285](https://patchblox.com/security/data/fix/linux/elsa-2023-0285.md) | Jan 24, 2023 | | Linux | firefox rocky 8 | 0:102.7.0-1.el8_7 | [RLSA-2023:0288](https://patchblox.com/security/data/fix/linux/rlsa-2023-0288.md) | Jan 23, 2023 | | Linux | firefox rocky 9 | 0:102.7.0-1.el9_1 | [RLSA-2023:0285](https://patchblox.com/security/data/fix/linux/rlsa-2023-0285.md) | Jan 23, 2023 | | Linux | firefox-esr Debian 12.15 (bookworm) | 102.7.0esr-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | firefox-esr Debian 13.5 (trixie) | 102.7.0esr-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | firefox-esr Debian 14 | 102.7.0esr-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 109.0+build2-0ubuntu0.18.04.1 | [firefox-geckodriver 109.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-109.0-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 109.0+build2-0ubuntu0.20.04.1 | [firefox-geckodriver 109.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-109.0-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 109.0+build2-0ubuntu0.18.04.1 | [firefox-mozsymbols 109.0+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-109.0-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 109.0+build2-0ubuntu0.20.04.1 | [firefox-mozsymbols 109.0+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-109.0-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:102.7.1-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | thunderbird Debian 13.5 (trixie) | 1:102.7.1-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | thunderbird Debian 14 | 1:102.7.1-1 | [DEBIAN-CVE-2023-23605](https://patchblox.com/security/data/fix/linux/debian-cve-2023-23605.md) | Jun 2, 2023 | | Linux | thunderbird RHEL 8 | 0:102.7.1-1.el8_7 | [RHSA-2023:0463](https://patchblox.com/security/data/fix/linux/rhsa-2023-0463.md) | Jan 25, 2023 | | Linux | thunderbird RHEL 9 | 0:102.7.1-1.el9_1 | [RHSA-2023:0476](https://patchblox.com/security/data/fix/linux/rhsa-2023-0476.md) | Jan 26, 2023 | | Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [thunderbird 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [thunderbird 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | thunderbird Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [thunderbird 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | | Linux | thunderbird almalinux 8 | 102.7.1-1.el8_7.alma | [ALSA-2023:0463](https://patchblox.com/security/data/fix/linux/alsa-2023-0463.md) | Jan 25, 2023 | | Linux | thunderbird almalinux 9 | 102.7.1-1.el9_1.alma | [ALSA-2023:0476](https://patchblox.com/security/data/fix/linux/alsa-2023-0476.md) | Jan 26, 2023 | | Linux | thunderbird ol 8 | 0:102.7.1-1.0.1.el8_7 | [ELSA-2023-0463](https://patchblox.com/security/data/fix/linux/elsa-2023-0463.md) | Jan 26, 2023 | | Linux | thunderbird ol 9 | 0:102.7.1-1.0.1.el9_1 | [ELSA-2023-0476](https://patchblox.com/security/data/fix/linux/elsa-2023-0476.md) | Jan 26, 2023 | | Linux | thunderbird rocky 8 | 0:102.7.1-1.el8_7 | [RLSA-2023:0463](https://patchblox.com/security/data/fix/linux/rlsa-2023-0463.md) | Jan 25, 2023 | | Linux | thunderbird rocky 9 | 0:102.7.1-1.el9_1 | [RLSA-2023:0476](https://patchblox.com/security/data/fix/linux/rlsa-2023-0476.md) | Jan 26, 2023 | | Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [thunderbird-gnome-support 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | thunderbird-gnome-support Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [thunderbird-gnome-support 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-gnome-support-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [thunderbird-mozsymbols 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | thunderbird-mozsymbols Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [thunderbird-mozsymbols 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-thunderbird-mozsymbols-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [xul-ext-calendar-timezones 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-calendar-timezones Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [xul-ext-calendar-timezones 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-calendar-timezones-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [xul-ext-gdata-provider 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-gdata-provider Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [xul-ext-gdata-provider 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-gdata-provider-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:102.7.1+build2-0ubuntu0.18.04.1 | [xul-ext-lightning 1:102.7.1+build2-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-102.7.1-build2-0ubuntu0.18.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:102.7.1+build2-0ubuntu0.20.04.1 | [xul-ext-lightning 1:102.7.1+build2-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-102.7.1-build2-0ubuntu0.20.04.1.md) | Jan 17, 2023 | | Linux | xul-ext-lightning Ubuntu 22.04.1 LTS (jammy) | 1:102.7.1+build2-0ubuntu0.22.04.1 | [xul-ext-lightning 1:102.7.1+build2-0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-xul-ext-lightning-1-102.7.1-build2-0ubuntu0.22.04.1.md) | Jan 17, 2023 | --- Data as of 2026-11-09T07:25:28Z UTC. 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