Description
Mozilla developer Nika Layzell and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103 and Firefox ESR 102.1. 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 < 102.2, Thunderbird < 102.2, and Firefox < 104.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 102.2 | 102.2 |
| Mozilla | Thunderbird | unspecified – < 102.2 | 102.2 |
| Mozilla | Firefox | unspecified – < 104 | 104 |
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 | 102.2.0esr-1 | — |
| Debian 14 | thunderbird | 1:102.2.0-1 | — |
| Debian 13 | firefox-esr | 102.2.0esr-1 | — |
| Debian 13 | thunderbird | 1:102.2.0-1 | — |
| Debian 12 | firefox-esr | 102.2.0esr-1 | — |
| Debian 12 | thunderbird | 1:102.2.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.22.04.1 | USN-5663-1 |
| Ubuntu 20.04 LTS | firefox | 104.0+build3-0ubuntu0.20.04.1 | USN-5581-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.20.04.1 | USN-5663-1 |
| Ubuntu 18.04 LTS | firefox | 104.0+build3-0ubuntu0.18.04.1 | USN-5581-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.18.04.1 | USN-5663-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +1 | 91.13.0-1.el9_0 | RHSA-2022:6174, RHSA-2022:6165 |
| RHEL 8 | firefox +1 | 91.13.0-1.el8_6 | RHSA-2022:6175, RHSA-2022:6164 |
| RHEL 7 | firefox +1 | 91.13.0-1.el7_9 | RHSA-2022:6179, RHSA-2022:6169 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | firefox +1 | 91.13.0-1.el8_4 | RHSA-2022:6176, RHSA-2022:6166 |
| RHEL 8.2 EUS | firefox +1 | 91.13.0-1.el8_2 | RHSA-2022:6177, RHSA-2022:6168 |
| RHEL 8.1 E4S | firefox +1 | 91.13.0-1.el8_1 | RHSA-2022:6178, RHSA-2022:6167 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 91.13.0-1.el9_0.alma | ALSA-2022:6174, ALSA-2022:6165 |
| AlmaLinux 8 | firefox +1 | 91.13.0-1.el8_6.alma | ALSA-2022:6175, ALSA-2022:6164 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 91.13.0-1.el8_6 | RLSA-2022:6175, RLSA-2022:6164 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP4 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP4 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
| SLES 15 SP3 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP3 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP3 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
| SLES 15 SP2 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP2 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SLES 15 SP1 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLES 15 SP1 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
| SLES 15 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLES 15 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
Show 19 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP4 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP4 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP3 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP3 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP2 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES 12 SP2 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SLES for SAP 15 SP2 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLES for SAP 15 SP1 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
| SLES for SAP 15 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLES for SAP 15 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES for SAP 12 SP5 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SLES for SAP 12 SP4 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SLE HPC 15 SP2 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLE HPC 15 SP1 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
| SLE HPC 15 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SLE HPC 15 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.2.0-112.130.1 | SUSE-SU-2022:3273-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox-branding-SLE | 102-35.9.1 | SUSE-SU-2022:3273-1 |
| SUSE Manager Server 4.1 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SUSE Manager Server 4.1 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SUSE Manager Retail Branch Server 4.1 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SUSE Manager Retail Branch Server 4.1 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SUSE Manager Proxy 4.1 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SUSE Manager Proxy 4.1 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| SUSE Enterprise Storage 6 | MozillaFirefox | 102.2.0-150000.150.56.1 | SUSE-SU-2022:3272-1 |
| SUSE Enterprise Storage 6 | MozillaFirefox-branding-SLE | 102-150000.4.22.1 | SUSE-SU-2022:3272-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 104.0-1.1 | openSUSE-SU-2024:12286-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.2.0-1.1 | openSUSE-SU-2024:12287-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| openSUSE Leap 15.4 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
| openSUSE Leap 15.3 | MozillaFirefox | 102.3.0-150200.152.61.1 | SUSE-SU-2022:3396-1 |
| openSUSE Leap 15.3 | MozillaFirefox-branding-SLE | 102-150200.9.10.1 | SUSE-SU-2022:3396-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 102.2.2-150200.8.82.1 | SUSE-SU-2022:3281-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.2.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.2.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.2.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.2.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.2.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.2.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 91.13.0-1.amzn2.0.1 | ALAS2-2022-1855 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +1 | 91.13.0-1.0.1.el9_0 | ELSA-2022-6174, ELSA-2022-6165 |
| Oracle Linux 8 | firefox +1 | 91.13.0-1.0.1.el8_6 | ELSA-2022-6175, ELSA-2022-6164 |
| Oracle Linux 7 | firefox +1 | 91.13.0-1.0.1.el7_9 | ELSA-2022-6179, ELSA-2022-6169 |
Advisories 34
- ALSA-2022:6165 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6174 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6175 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:6164 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:6179 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2022:6169 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5663-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5581-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RLSA-2022:6164 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2022:6175 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2022:3273-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3396-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3281-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12287-1 MozillaThunderbird-102.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12286-1 MozillaFirefox-104.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3272-1 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-2022:6178 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6177 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6175 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6176 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6174 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6168 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6167 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6166 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6164 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6165 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- ALAS2-2022-1855 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 10, 2022
- ELSA-2022-6164 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022
- ELSA-2022-6169 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022
- ELSA-2022-6179 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022
- ELSA-2022-6174 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022
- ELSA-2022-6165 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022
- ELSA-2022-6175 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 25, 2022