CVE-2023-6862
Mozilla Thunderbird and 1 other: A use-after-free was identified in the `nsDNSService::Init`.
CVE-2023-6862 is fixed in 10 products on 2 platforms, first by DEBIAN-CVE-2023-6862, released December 19, 2023. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
8.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0095
61st percentile
A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Thunderbird (en-US) | 115.8.0 | Mozilla Thunderbird (en-US) 115.8.0 | Feb 21, 2024 |
| Linux | |||
| firefox · RHEL 8 | 0:115.6.0-1.el8_9 | RHSA-2024:0012 | Jan 2, 2024 |
| firefox · RHEL 9 | 0:115.6.0-1.el9_3 | RHSA-2024:0025 | Jan 2, 2024 |
| firefox · almalinux 8 | 115.6.0-1.el8_9.alma | ALSA-2024:0012 | Jan 2, 2024 |
| firefox · almalinux 9 | 115.6.0-1.el9_3.alma | ALSA-2024:0025 | Jan 2, 2024 |
| firefox · ol 8 | 0:115.6.0-1.0.1.el8_9 | ELSA-2024-0012 | Jan 3, 2024 |
| firefox · ol 9 | 0:115.6.0-1.0.1.el9_3 | ELSA-2024-0025 | Jan 3, 2024 |
| firefox · rocky 8 | 0:115.6.0-1.el8_9 | RLSA-2024:0012 | Jan 9, 2024 |
| firefox-esr · Debian 12.15 (bookworm) | 115.6.0esr-1~deb12u1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| firefox-esr · Debian 13.5 (trixie) | 115.6.0esr-1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| firefox-esr · Debian 14 | 115.6.0esr-1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| firefox-x11 · RHEL 9 | 0:115.6.0-1.el9_3 | RHSA-2024:0025 | Jan 2, 2024 |
| firefox-x11 · almalinux 9 | 115.6.0-1.el9_3.alma | ALSA-2024:0025 | Jan 2, 2024 |
| firefox-x11 · ol 9 | 0:115.6.0-1.0.1.el9_3 | ELSA-2024-0025 | Jan 3, 2024 |
| thunderbird · Debian 12.15 (bookworm) | 1:115.6.0-1~deb12u1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| thunderbird · Debian 13.5 (trixie) | 1:115.6.0-1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| thunderbird · Debian 14 | 1:115.6.0-1 | DEBIAN-CVE-2023-6862 | Dec 19, 2023 |
| thunderbird · RHEL 8 | 0:115.6.0-1.el8_9 | RHSA-2024:0003 | Jan 2, 2024 |
| thunderbird · RHEL 9 | 0:115.6.0-1.el9_3 | RHSA-2024:0001 | Jan 2, 2024 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | thunderbird 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| thunderbird · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | thunderbird 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| thunderbird · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | thunderbird 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
| thunderbird · almalinux 8 | 115.6.0-1.el8_9.alma | ALSA-2024:0003 | Jan 2, 2024 |
| thunderbird · almalinux 9 | 115.6.0-1.el9_3.alma | ALSA-2024:0001 | Jan 2, 2024 |
| thunderbird · ol 8 | 0:115.6.0-1.0.1.el8_9 | ELSA-2024-0003 | Jan 3, 2024 |
| thunderbird · ol 9 | 0:115.6.0-1.0.1.el9_3 | ELSA-2024-0001 | Jan 3, 2024 |
| thunderbird · rocky 8 | 0:115.6.0-1.el8_9 | RLSA-2024:0003 | Jan 9, 2024 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| thunderbird-gnome-support · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | thunderbird-gnome-support 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| thunderbird-gnome-support · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | thunderbird-gnome-support 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| thunderbird-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | thunderbird-mozsymbols 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| thunderbird-mozsymbols · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | thunderbird-mozsymbols 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| xul-ext-calendar-timezones · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | xul-ext-calendar-timezones 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| xul-ext-calendar-timezones · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | xul-ext-calendar-timezones 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| xul-ext-gdata-provider · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | xul-ext-gdata-provider 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| xul-ext-gdata-provider · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | xul-ext-gdata-provider 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:115.6.0+build2-0ubuntu0.20.04.1 | xul-ext-lightning 1:115.6.0+build2-0ubuntu0.20.04.1 | Dec 19, 2023 |
| xul-ext-lightning · Ubuntu 22.04.1 LTS (jammy) | 1:115.6.0+build2-0ubuntu0.22.04.1 | xul-ext-lightning 1:115.6.0+build2-0ubuntu0.22.04.1 | Dec 19, 2023 |
| xul-ext-lightning · Ubuntu 24.04.5 LTS (noble) | 1:115.6.0+build2-0ubuntu1 | xul-ext-lightning 1:115.6.0+build2-0ubuntu1 | Dec 19, 2023 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.