Description
Memory safety bugs present in Firefox 131, Firefox ESR 128.3, and Thunderbird 128.3. 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 < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 132 | 132 |
| Mozilla | Firefox ESR | unspecified – < 128.4 | 128.4 |
| Mozilla | Thunderbird | unspecified – < 128.4, unspecified – < 132 | 128.4 |
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 | 128.4.0esr-1 | — |
| Debian 14 | thunderbird | 1:128.4.0esr-1 | — |
| Debian 13 | firefox-esr | 128.4.0esr-1 | — |
| Debian 13 | thunderbird | 1:128.4.0esr-1 | — |
| Debian 12 | firefox-esr | 128.4.0esr-1~deb12u1 | DSA-5801-1 |
| Debian 12 | thunderbird | 1:128.4.0esr-1~deb12u1 | DSA-5803-1 |
| Debian 11 | firefox-esr | 128.4.0esr-1~deb11u1 | DLA-3943-1 |
| Debian 11 | thunderbird | 1:128.4.0esr-1~deb11u1 | DLA-3944-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 132.0+build1-0ubuntu0.20.04.1 | USN-7086-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 128.4.0-1.el9_4 | RHSA-2024:9554, RHSA-2024:9552, RHSA-2024:8793 |
| RHEL 8 | firefox +1 | 128.4.0-1.el8_10 | RHSA-2024:8790, RHSA-2024:8729 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 128.4.0-1.el9_2 | RHSA-2024:8728, RHSA-2024:8720 |
| RHEL 9.0 E4S | firefox +1 | 128.4.0-1.el9_0 | RHSA-2024:9019, RHSA-2024:8721 |
| RHEL 8.8 EUS | firefox +1 | 128.4.0-1.el8_8 | RHSA-2024:9018, RHSA-2024:8722 |
| RHEL 8.6 TUS | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.6 E4S | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.6 AUS | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.4 TUS | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.4 E4S | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.4 AUS | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.2 AUS | firefox +1 | 128.4.0-1.el8_2 | RHSA-2024:9016, RHSA-2024:8724 |
| RHEL 7 ELS | firefox | 128.4.0-1.el7_9 | RHSA-2024:8727 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 128.4.0-1.el9_4 | ALSA-2024:9554, ALSA-2024:8726 |
| AlmaLinux 9 | thunderbird | 128.4.0-1.el9_4.alma.1 | ALSA-2024:9552, ALSA-2024:8793 |
| AlmaLinux 8 | firefox | 128.4.0-1.el8_10 | ALSA-2024:8729 |
| AlmaLinux 8 | thunderbird | 128.4.0-1.el8_10.alma.1 | ALSA-2024:8790 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 128.4.0-1.el9_4 | RLSA-2024:8793, RLSA-2024:8726 |
| Rocky Linux 8 | firefox +1 | 128.4.0-1.el8_10 | RLSA-2024:8790, RLSA-2024:8729 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP6 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| SLES 15 SP5 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP5 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| SLES 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 128.4.0-112.234.2 | SUSE-SU-2024:3899-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 132.0.1-1.1 | openSUSE-SU-2024:14483-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozjs128 +1 | 128.4.0-1.1 | openSUSE-SU-2024:14461-1, openSUSE-SU-2024:14438-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 128.7.0-1.amzn2.0.2 | ALAS2-2025-2789 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 128.4.0-1.0.1.el9_4 | ELSA-2024-9554, ELSA-2024-9552, ELSA-2024-8793 |
| Oracle Linux 8 | firefox +1 | 128.4.0-1.0.1.el8_10 | ELSA-2024-8790, ELSA-2024-8729 |
| Oracle Linux 7 | firefox | 128.4.0-1.0.1.el7_9 | ELSA-2024-8727 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 132.0-r0 | — |
Advisories 50
- ALSA-2024:9554 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:9552 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8726 Moderate: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8793 Moderate: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8729 Moderate: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8790 Moderate: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:9554 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2024:9552 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2024:9019 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9017 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9018 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9016 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9015 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8793 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8729 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8790 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8727 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8728 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8725 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8726 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8723 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8724 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8721 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8722 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8720 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7086-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5801-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5803-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3944-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3943-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:8729 Moderate: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8790 Moderate: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8726 Moderate: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8793 Moderate: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:14461-1 libmozjs-128-0-128.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14483-1 MozillaFirefox-132.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14438-1 MozillaThunderbird-128.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3899-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4050-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3898-1 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
- WID-SEC-2024-3296 Mozilla Firefox, ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 2, 2026
- ALAS2-2025-2789 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 7, 2025
- ELSA-2024-9554 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 18, 2024
- ELSA-2024-9552 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 18, 2024
- ELSA-2024-8727 Moderate: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 8, 2024
- ELSA-2024-8790 Moderate: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 4, 2024
- ELSA-2024-8793 Moderate: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 4, 2024
- ELSA-2024-8726 Moderate: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 1, 2024
- ELSA-2024-8729 Moderate: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 1, 2024
References
- Memory safety bugs fixed in Firefox 132, Thunderbird 132, Firefox ESR 128.4, and Thunderbird 128.4
- https://www.mozilla.org/security/advisories/mfsa2024-55/
- https://www.mozilla.org/security/advisories/mfsa2024-56/
- https://www.mozilla.org/security/advisories/mfsa2024-58/
- https://www.mozilla.org/security/advisories/mfsa2024-59/