Description
Mozilla developers Randell Jesup, Valentin Gosu, Olli Pettay, and the Mozilla Fuzzing Team reported memory safety bugs present in Thunderbird 102.5. 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 < 108, Firefox ESR < 102.6, and Thunderbird < 102.6.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 108 | 108 |
| Mozilla | Firefox ESR | unspecified – < 102.6 | 102.6 |
| Mozilla | Thunderbird | unspecified – < 102.6 | 102.6 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 102.6.0esr-1 | — |
| Debian 14 | thunderbird | 1:102.6.0-1 | — |
| Debian 13 | firefox-esr | 102.6.0esr-1 | — |
| Debian 13 | thunderbird | 1:102.6.0-1 | — |
| Debian 12 | firefox-esr | 102.6.0esr-1 | — |
| Debian 12 | thunderbird | 1:102.6.0-1 | — |
| Debian 11 | firefox-esr | 102.6.0esr-1~deb11u1 | DSA-5301-1 |
| Debian 11 | thunderbird | 1:102.6.0-1~deb11u1 | DSA-5303-1 |
| Debian 10 | firefox-esr | 102.6.0esr-1~deb10u1 | DLA-3241-1 |
| Debian 10 | thunderbird | 1:102.6.0-1~deb10u1 | DLA-3242-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:102.7.1+build2-0ubuntu0.22.04.1 | USN-5824-1 |
| Ubuntu 20.04 LTS | firefox | 108.0+build2-0ubuntu0.20.04.1 | USN-5782-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:102.7.1+build2-0ubuntu0.20.04.1 | USN-5824-1 |
| Ubuntu 18.04 LTS | firefox | 108.0+build2-0ubuntu0.18.04.1 | USN-5782-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | thunderbird | 1:102.7.1+build2-0ubuntu0.18.04.1 | USN-5824-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox | 102.6.0-1.el9_1 | RHSA-2022:9065 |
| RHEL 9 | thunderbird | 102.6.0-2.el9_1 | RHSA-2022:9080 |
| RHEL 8 | firefox | 102.6.0-1.el8_7 | RHSA-2022:9067 |
| RHEL 8 | thunderbird | 102.6.0-2.el8_7 | RHSA-2022:9074 |
| RHEL 7 | firefox | 102.6.0-1.el7_9 | RHSA-2022:9072 |
| RHEL 7 | thunderbird | 102.6.0-2.el7_9 | RHSA-2022:9079 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox | 102.6.0-1.el9_0 | RHSA-2022:9066 |
| RHEL 9.0 EUS | thunderbird | 102.6.0-2.el9_0 | RHSA-2022:9081 |
| RHEL 8.6 EUS | firefox | 102.6.0-1.el8_6 | RHSA-2022:9068 |
| RHEL 8.6 EUS | thunderbird | 102.6.0-2.el8_6 | RHSA-2022:9078 |
| RHEL 8.4 EUS | firefox | 102.6.0-1.el8_4 | RHSA-2022:9069 |
| RHEL 8.4 EUS | thunderbird | 102.6.0-2.el8_4 | RHSA-2022:9075 |
| RHEL 8.2 TUS | firefox | 102.6.0-1.el8_2 | RHSA-2022:9070 |
| RHEL 8.2 TUS | thunderbird | 102.6.0-2.el8_2 | RHSA-2022:9076 |
| RHEL 8.2 E4S | firefox | 102.6.0-1.el8_2 | RHSA-2022:9070 |
| RHEL 8.2 E4S | thunderbird | 102.6.0-2.el8_2 | RHSA-2022:9076 |
| RHEL 8.2 AUS | firefox | 102.6.0-1.el8_2 | RHSA-2022:9070 |
| RHEL 8.2 AUS | thunderbird | 102.6.0-2.el8_2 | RHSA-2022:9076 |
| RHEL 8.1 E4S | firefox | 102.6.0-1.el8_1 | RHSA-2022:9071 |
| RHEL 8.1 E4S | thunderbird | 102.6.0-2.el8_1 | RHSA-2022:9077 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox | 102.6.0-1.el9_1.alma | ALSA-2022:9065 |
| AlmaLinux 9 | thunderbird | 102.6.0-2.el9_1.alma | ALSA-2022:9080 |
| AlmaLinux 8 | firefox | 102.6.0-1.el8_7.alma | ALSA-2022:9067 |
| AlmaLinux 8 | thunderbird | 102.6.0-2.el8_7.alma | ALSA-2022:9074 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox | 102.6.0-1.el8_7 | RLSA-2022:9067 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SLES 15 SP4 | MozillaThunderbird | 102.6.0-150200.8.96.1 | SUSE-SU-2022:4579-1 |
| SLES 15 SP3 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SLES 15 SP2 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SLES 15 SP1 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
| SLES 15 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLES 12 SP4 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLES 12 SP3 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLES 12 SP2 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
| SLES for SAP 15 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
| SLE HPC 15 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.6.0-112.142.1 | SUSE-SU-2022:4460-1 |
| SUSE Manager Server 4.1 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SUSE Manager Retail Branch Server 4.1 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SUSE Manager Proxy 4.1 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| SUSE Enterprise Storage 6 | MozillaFirefox | 102.6.0-150000.150.68.1 | SUSE-SU-2022:4461-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 108.0.1-1.1 | openSUSE-SU-2024:12577-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.6.0-1.1 | openSUSE-SU-2024:12571-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.6.0-150200.8.96.1 | SUSE-SU-2022:4579-1 |
| openSUSE Leap 15.3 | MozillaFirefox | 102.6.0-150200.152.70.1 | SUSE-SU-2022:4462-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 102.6.0-150200.8.96.1 | SUSE-SU-2022:4579-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.6.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.6.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.6.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.6.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.6.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.6.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.7.1-1.amzn2.0.1 | ALAS2-2023-1951 |
Advisories 37
- ALSA-2022:9080 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:9065 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:9067 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:9074 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:9079 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2022:9072 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5824-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5782-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5301-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5303-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3241-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3242-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:9067 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:12577-1 MozillaFirefox-108.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4579-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12571-1 MozillaThunderbird-102.6.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4462-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4460-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4461-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2022:9081 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9080 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9078 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9077 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9075 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9076 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9074 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9071 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9070 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9068 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9069 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9067 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9065 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:9066 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ALAS2-2023-1951 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 30, 2025
- WID-SEC-2022-2319 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
- WID-SEC-2023-0561 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2023
References
- https://www.mozilla.org/security/advisories/mfsa2022-52/
- https://www.mozilla.org/security/advisories/mfsa2022-53/
- https://www.mozilla.org/security/advisories/mfsa2022-51/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1782219%2C1797370%2C1797685%2C1801102%2C1801315%2C1802395
- GLSA-202305-06 vendor-advisory
- GLSA-202305-13 vendor-advisory