Description
Memory safety bugs present in Firefox 110 and Firefox ESR 102.8. 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 < 111, Firefox ESR < 102.9, and Thunderbird < 102.9.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 111 | 111 |
| Mozilla | Firefox ESR | unspecified – < 102.9 | 102.9 |
| Mozilla | Thunderbird | unspecified – < 102.9 | 102.9 |
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 | 102.9.0esr-1 | — |
| Debian 14 | thunderbird | 1:102.9.0-1 | — |
| Debian 13 | firefox-esr | 102.9.0esr-1 | — |
| Debian 13 | thunderbird | 1:102.9.0-1 | — |
| Debian 12 | firefox-esr | 102.9.0esr-1 | — |
| Debian 12 | thunderbird | 1:102.9.0-1 | — |
| Debian 11 | firefox-esr | 102.9.0esr-1~deb11u1 | DSA-5374-1 |
| Debian 11 | thunderbird | 1:102.9.0-1~deb11u1 | DSA-5375-1 |
| Debian 10 | firefox-esr | 102.9.0esr-1~deb10u1 | DLA-3364-1 |
| Debian 10 | thunderbird | 1:102.9.0-1~deb10u1 | DLA-3365-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:102.9.0+build1-0ubuntu0.22.04.1 | USN-5972-1 |
| Ubuntu 20.04 LTS | firefox | 111.0+build2-0ubuntu0.20.04.1 | USN-5954-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:102.9.0+build1-0ubuntu0.20.04.1 | USN-5972-1 |
| Ubuntu 18.04 LTS | firefox | 111.0+build2-0ubuntu0.18.04.1 | USN-5954-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | thunderbird | 1:102.9.0+build1-0ubuntu0.18.04.1 | USN-5972-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +1 | 102.9.0-3.el9_1 | RHSA-2023:1337 |
| RHEL 9 | thunderbird | 102.9.0-1.el9_1 | RHSA-2023:1407 |
| RHEL 8 | firefox | 102.9.0-3.el8_7 | RHSA-2023:1336 |
| RHEL 8 | thunderbird | 102.9.0-1.el8_7 | RHSA-2023:1403 |
| RHEL 7 | firefox | 102.9.0-3.el7_9 | RHSA-2023:1333 |
| RHEL 7 | thunderbird | 102.9.0-1.el7_9 | RHSA-2023:1401 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox | 102.9.0-3.el9_0 | RHSA-2023:1364 |
| RHEL 9.0 EUS | thunderbird | 102.9.0-1.el9_0 | RHSA-2023:1402 |
| RHEL 8.6 EUS | firefox | 102.9.0-3.el8_6 | RHSA-2023:1367 |
| RHEL 8.6 EUS | thunderbird | 102.9.0-1.el8_6 | RHSA-2023:1404 |
| RHEL 8.4 EUS | firefox | 102.9.0-4.el8_4 | RHSA-2023:1444 |
| RHEL 8.4 EUS | thunderbird | 102.9.0-2.el8_4 | RHSA-2023:1472 |
| RHEL 8.2 TUS | firefox | 102.9.0-4.el8_2 | RHSA-2023:1445 |
| RHEL 8.2 TUS | thunderbird | 102.9.0-2.el8_2 | RHSA-2023:1443 |
| RHEL 8.2 E4S | firefox | 102.9.0-4.el8_2 | RHSA-2023:1445 |
| RHEL 8.2 E4S | thunderbird | 102.9.0-2.el8_2 | RHSA-2023:1443 |
| RHEL 8.2 AUS | firefox | 102.9.0-4.el8_2 | RHSA-2023:1445 |
| RHEL 8.2 AUS | thunderbird | 102.9.0-2.el8_2 | RHSA-2023:1443 |
| RHEL 8.1 E4S | firefox | 102.9.0-4.el8_1 | RHSA-2023:1479 |
| RHEL 8.1 E4S | thunderbird | 102.9.0-2.el8_1 | RHSA-2023:1442 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 102.9.0-3.el9_1.alma | ALSA-2023:1337 |
| AlmaLinux 9 | thunderbird | 102.9.0-1.el9_1.alma | ALSA-2023:1407 |
| AlmaLinux 8 | firefox | 102.9.0-3.el8_7.alma | ALSA-2023:1336 |
| AlmaLinux 8 | thunderbird | 102.9.0-1.el8_7.alma | ALSA-2023:1403 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox | 102.9.0-3.el9_1 | RLSA-2023:1337 |
| Rocky Linux 9 | thunderbird | 102.9.0-1.el9_1 | RLSA-2023:1407 |
| Rocky Linux 8 | firefox | 102.9.0-3.el8_7 | RLSA-2023:1336 |
| Rocky Linux 8 | thunderbird | 102.9.0-1.el8_7 | RLSA-2023:1403 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLES 15 SP4 | MozillaThunderbird | 102.9.1-150200.8.110.2 | SUSE-SU-2023:1736-1 |
| SLES 15 SP3 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLES 15 SP2 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLES 15 SP1 | MozillaFirefox | 102.9.0-150000.150.79.1 | SUSE-SU-2023:0728-1 |
| SLES 12 SP5 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SLES 12 SP2 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.9.0-150000.150.79.1 | SUSE-SU-2023:0728-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.9.0-150000.150.79.1 | SUSE-SU-2023:0728-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.9.0-112.153.1 | SUSE-SU-2023:0763-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 111.0.1-1.1 | openSUSE-SU-2024:12839-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.9.0-1.1 | openSUSE-SU-2024:12791-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.9.0-150200.152.81.1 | SUSE-SU-2023:0835-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 102.9.1-150200.8.110.2 | SUSE-SU-2023:1736-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.9.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.9.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.9.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.9.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.9.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.9.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.9.0-1.amzn2.0.1 | ALAS2-2023-1988 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +1 | 102.9.0-3.0.1.el9_1 | ELSA-2023-1337 |
| Oracle Linux 9 | thunderbird | 102.9.0-1.0.1.el9_1 | ELSA-2023-1407 |
| Oracle Linux 8 | firefox | 102.9.0-3.0.1.el8_7 | ELSA-2023-1336 |
| Oracle Linux 8 | thunderbird | 102.9.0-1.0.1.el8_7 | ELSA-2023-1403 |
| Oracle Linux 7 | firefox | 102.9.0-3.0.1.el7_9 | ELSA-2023-1333 |
| Oracle Linux 7 | thunderbird | 102.9.0-1.0.1.el7_9 | ELSA-2023-1401 |
Advisories 47
- ALSA-2023:1337 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:1407 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:1403 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:1336 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:1401 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:1333 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5972-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-5954-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5375-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5374-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3364-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3365-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:1337 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:1336 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:1403 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:1407 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:12839-1 MozillaFirefox-111.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12791-1 MozillaThunderbird-102.9.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0835-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0728-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:1736-1 Security update for MozillaThunderbird 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-2023:1472 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1479 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1445 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1443 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1444 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1442 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1407 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1403 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1404 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1402 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1367 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1337 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1364 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:1336 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-1424 Xerox FreeFlow Print Server für Solaris: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- SUSE-SU-2023:0763-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-0643 Mozilla Firefox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
- WID-SEC-2023-0673 Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 29, 2023
- ELSA-2023-1407 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 22, 2023
- ELSA-2023-1403 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 22, 2023
- ELSA-2023-1401 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 22, 2023
- ALAS2-2023-1988 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 21, 2023
- ELSA-2023-1337 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 20, 2023
- ELSA-2023-1336 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 20, 2023
- ELSA-2023-1333 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 20, 2023