CVE catalog
CVE-2023-6862
firefox-esr: CVE-2023-6862
- Severity
- High · CVSS 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.95% · Oct 25, 2026
The Mozilla Foundation Security Advisory describes this flaw as: A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. Mozilla: Use-after-free in <code>nsDNSService</code> Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | firefox-esr | sid | 153.5.1esr-1 | fixed |
| Debian | firefox-esr | forky | 153.5.1esr-1 | fixed |
| Debian | firefox-esr | trixie | 140.15.0esr-1~deb13u1 | fixed |
| Debian | firefox-esr | trixie-security | 153.5.1esr-1~deb13u1 | fixed |
| Debian | firefox-esr | bookworm | 140.12.0esr-1~deb12u1 | fixed |
| Debian | firefox-esr | bookworm-security | 153.5.1esr-1~deb12u1 | fixed |
| Debian | thunderbird | sid | 1:153.5.1esr-1 | fixed |
| Debian | thunderbird | forky | 1:153.5.0esr-1 | fixed |
| Debian | thunderbird | trixie | 1:140.12.0esr-1~deb13u1 | fixed |
| Debian | thunderbird | trixie-security | 1:153.5.1esr-1~deb13u2 | fixed |
| Debian | thunderbird | bookworm | 1:140.12.0esr-1~deb12u1 | fixed |
| Debian | thunderbird | bookworm-security | 1:153.5.1esr-1~deb12u1 | fixed |
| Ubuntu | mozjs52 | 18.04 | 52.3.1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.3.1-7fakesync1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.8.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs52 | 18.04 | 52.9.1-0ubuntu0.18.04.1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu1 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu3 | vulnerable |
| Ubuntu | mozjs38 | 18.04 | 38.8.0~repack1-0ubuntu4 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.1.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.1.2+build1-0ubuntu2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.2.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.2.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.3.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.3.1+build1-0ubuntu2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.4.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.4.2+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.5.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.6.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.7.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.7.0+build1-0ubuntu2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.8.0+build2-0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:68.10.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.7.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.8.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.11.0+build1-0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.13.0+build1-0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.14.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:78.14.0+build1-0ubuntu0.20.04.2 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:91.5.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:91.7.0+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:91.8.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:91.9.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:91.11.0+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.2.2+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.4.2+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.7.1+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.8.0+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.9.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.10.0+build2-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.11.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.13.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.15.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:102.15.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:115.3.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:115.4.1+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:115.5.0+build1-0ubuntu0.20.04.1 | vulnerable |
| Ubuntu | thunderbird | 20.04 | 1:115.6.0+build2-0ubuntu0.20.04.1 | fixed |
| Ubuntu | mozjs68 | 20.04 | 68.5.0-1~fakesync | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.5.0-2~fakesync | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.6.0-1 | vulnerable |
| Ubuntu | mozjs68 | 20.04 | 68.6.0-1ubuntu1 | vulnerable |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1build1 | vulnerable |
| Ubuntu | mozjs52 | 20.04 | 52.9.1-1ubuntu3 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.11.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.12.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.13.0-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs102 | 22.04 | 102.15.1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.13.0-1 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.15.0-2 | vulnerable |
| Ubuntu | mozjs78 | 22.04 | 78.15.0-4ubuntu1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.5.1-0ubuntu1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.6.0-1 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.6.0-2 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.7.0-2 | vulnerable |
| Ubuntu | mozjs91 | 22.04 | 91.10.0-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.1.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.3.2+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.4.0+build1.1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.4.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.5.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.5.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.6.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.7.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.7.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.8.0+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.9.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:91.11.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.2.2+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.4.2+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.7.1+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.8.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.9.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.10.0+build2-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.11.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.13.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.15.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:102.15.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.3.1+build1-0ubuntu0.22.04.2 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.4.1+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.5.0+build1-0ubuntu0.22.04.1 | vulnerable |
| Ubuntu | thunderbird | 22.04 | 1:115.6.0+build2-0ubuntu0.22.04.1 | fixed |
| Ubuntu | mozjs102 | 24.04 | 102.15.1-1 | vulnerable |
| Ubuntu | mozjs102 | 24.04 | 102.15.1-3ubuntu2 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.3.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.4.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.4.3+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.5.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.5.1+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.5.2+build2-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.6.0+build1-0ubuntu1 | vulnerable |
| Ubuntu | thunderbird | 24.04 | 1:115.6.0+build2-0ubuntu1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | firefox-esr | source | sid | 115.6.0esr-1 | not yet assigned | Not reported | Not reported |
| Debian | firefox-esr | source | forky | 115.6.0esr-1 | not yet assigned | Not reported | Not reported |
| Debian | firefox-esr | source | trixie | 115.6.0esr-1 | not yet assigned | Not reported | Not reported |
| Debian | firefox-esr | source | bookworm | 115.6.0esr-1~deb12u1 | not yet assigned | Not reported | Not reported |
| Debian | thunderbird | source | sid | 1:115.6.0-1 | not yet assigned | Not reported | Not reported |
| Debian | thunderbird | source | forky | 1:115.6.0-1 | not yet assigned | Not reported | Not reported |
| Debian | thunderbird | source | trixie | 1:115.6.0-1 | not yet assigned | Not reported | Not reported |
| Debian | thunderbird | source | bookworm | 1:115.6.0-1~deb12u1 | not yet assigned | Not reported | Not reported |
| Ubuntu | thunderbird | deb | 20.04 | 1:115.6.0+build2-0ubuntu0.20.04.1 | Not reported | UBUNTU-CVE-2023-6862 | Not reported |
| Ubuntu | thunderbird | deb | 22.04 | 1:115.6.0+build2-0ubuntu0.22.04.1 | Not reported | UBUNTU-CVE-2023-6862 | Not reported |
| Ubuntu | thunderbird | deb | 24.04 | 1:115.6.0+build2-0ubuntu1 | Not reported | UBUNTU-CVE-2023-6862 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
References
- [https://access.redhat.com/errata/RHSA-2024:0019]
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2024_0003.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2023-6862]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2023-6862]
- [https://security-tracker.debian.org/tracker/CVE-2023-6862]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-1248.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]