Description
Mozilla developers and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 102. 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 < 102.1, Firefox < 103, and Thunderbird < 102.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 102.1 | 102.1 |
| Mozilla | Firefox | unspecified – < 103 | 103 |
| Mozilla | Thunderbird | unspecified – < 102.1 | 102.1 |
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 | thunderbird | 1:102.1.0-1 | — |
| Debian 13 | thunderbird | 1:102.1.0-1 | — |
| Debian 12 | thunderbird | 1:102.1.0-1 | — |
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 | 103.0+build1-0ubuntu0.20.04.1 | USN-5536-1 |
| 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 | 103.0+build1-0ubuntu0.18.04.1 | USN-5536-1 |
| 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 | 91.12.0-2.el9_0 | RHSA-2022:5767 |
| RHEL 9 | thunderbird | 91.12.0-1.el9_0 | RHSA-2022:5778 |
| RHEL 8 | firefox | 91.12.0-2.el8_6 | RHSA-2022:5777 |
| RHEL 8 | thunderbird | 91.12.0-1.el8_6 | RHSA-2022:5774 |
| RHEL 7 | firefox | 91.12.0-2.el7_9 | RHSA-2022:5776 |
| RHEL 7 | thunderbird | 91.12.0-1.el7_9 | RHSA-2022:5773 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | firefox | 91.12.0-2.el8_4 | RHSA-2022:5769 |
| RHEL 8.4 EUS | thunderbird | 91.12.0-1.el8_4 | RHSA-2022:5772 |
| RHEL 8.2 EUS | firefox | 91.12.0-2.el8_2 | RHSA-2022:5765 |
| RHEL 8.2 EUS | thunderbird | 91.12.0-1.el8_2 | RHSA-2022:5771 |
| RHEL 8.1 E4S | firefox | 91.12.0-2.el8_1 | RHSA-2022:5766 |
| RHEL 8.1 E4S | thunderbird | 91.12.0-1.el8_1 | RHSA-2022:5770 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox | 91.12.0-2.el9_0.alma | ALSA-2022:5767 |
| AlmaLinux 8 | firefox | 91.12.0-2.el8_6.alma | ALSA-2022:5777 |
| AlmaLinux 8 | thunderbird | 91.12.0-1.el8_6.alma | ALSA-2022:5774 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox | 91.12.0-2.el8_6 | RLSA-2022:5777 |
| Rocky Linux 8 | thunderbird | 91.12.0-1.el8_6 | RLSA-2022:5774 |
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 | 103.0.1-1.1 | openSUSE-SU-2024:12227-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.1.0-1.1 | openSUSE-SU-2024:12228-1 |
| 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 v3.24 | librewolf | 103.0-r0 | — |
| Alpine v3.23 | firefox +1 | 103.0-r0 | — |
| Alpine v3.23 | firefox-esr | 102.1.0-r0 | — |
| Alpine v3.22 | firefox +1 | 103.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.1.0-r0 | — |
| Alpine v3.21 | firefox +1 | 103.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.1.0-r0 | — |
| Alpine v3.20 | firefox | 103.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.1.0-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | firefox | 103.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.1.0-r0 | — |
| Alpine v3.18 | firefox | 103.0-r0 | — |
| Alpine v3.18 | firefox-esr | 102.1.0-r0 | — |
| Alpine v3.17 | firefox | 103.0-r0 | — |
| Alpine v3.17 | firefox-esr | 102.1.0-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 | 91.12.0-2.0.1.el9_0 | ELSA-2022-5767 |
| Oracle Linux 9 | thunderbird | 91.12.0-1.0.1.el9_0 | ELSA-2022-5778 |
| Oracle Linux 8 | firefox | 91.12.0-2.0.1.el8_6 | ELSA-2022-5777 |
| Oracle Linux 8 | thunderbird | 91.12.0-1.0.1.el8_6 | ELSA-2022-5774 |
| Oracle Linux 7 | firefox | 91.12.0-2.0.1.el7_9 | ELSA-2022-5776 |
| Oracle Linux 7 | thunderbird | 91.12.0-1.0.1.el7_9 | ELSA-2022-5773 |
Advisories 34
- ALSA-2022:5767 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:5774 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:5777 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:5776 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2022:5773 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-5536-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RLSA-2022:5774 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:5777 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
- openSUSE-SU-2024:12227-1 MozillaFirefox-103.0.1-1.1 on GA media 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-2024:12228-1 MozillaThunderbird-102.1.0-1.1 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-2022:5777 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5778 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5774 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5770 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5771 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5772 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5767 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5769 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5766 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:5765 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2022-0837 Mozilla Firefox und Mozilla Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 10, 2024
- ALAS2-2022-1855 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 10, 2022
- ELSA-2022-5777 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 2, 2022
- ELSA-2022-5776 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 2, 2022
- ELSA-2022-5767 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 2, 2022
- ELSA-2022-5778 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 2, 2022
- ELSA-2022-5774 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 2, 2022
- ELSA-2022-5773 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 1, 2022