Description
Memory safety bugs present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. 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 < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 131 | 131 |
| Mozilla | Firefox ESR | unspecified – < 128.3, unspecified – < 115.16 | 128.3 |
| Mozilla | Thunderbird | unspecified – < 128.3, unspecified – < 131 | 128.3 |
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 | 128.3.0esr-1 | — |
| Debian 14 | thunderbird | 1:128.3.0esr-1 | — |
| Debian 13 | firefox-esr | 128.3.0esr-1 | — |
| Debian 13 | thunderbird | 1:128.3.0esr-1 | — |
| Debian 12 | firefox-esr | 128.3.0esr-1~deb12u1 | DSA-5783-1 |
| Debian 12 | thunderbird | 1:115.16.0esr-1~deb12u1 | DSA-5789-1 |
| Debian 11 | firefox-esr | 128.3.0esr-1~deb11u2 | DLA-3913-1 |
| Debian 11 | thunderbird | 1:115.16.0esr-1~deb11u1 | DLA-3916-1 |
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 | 1:115.18.0+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 131.0+build1.1-0ubuntu0.20.04.1 | USN-7056-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.18.0+build1-0ubuntu0.20.04.1 | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 128.3.0-1.el9_4 | RHSA-2024:7552, RHSA-2024:7505 |
| RHEL 8 | firefox +1 | 128.3.0-1.el8_10 | RHSA-2024:7700, RHSA-2024:7699 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 128.3.0-1.el9_2 | RHSA-2024:7853, RHSA-2024:7622 |
| RHEL 9.0 E4S | firefox +1 | 128.3.0-1.el9_0 | RHSA-2024:7855, RHSA-2024:7621 |
| RHEL 8.8 EUS | firefox | 128.3.0-1.el8_8 | RHSA-2024:7842 |
| RHEL 8.8 EUS | thunderbird | 128.3.1-1.el8_8 | RHSA-2024:8166 |
| RHEL 8.6 TUS | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.6 E4S | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.6 AUS | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.4 TUS | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.4 E4S | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.4 AUS | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.2 AUS | firefox +1 | 128.3.0-1.el8_2 | RHSA-2024:7856, RHSA-2024:7646 |
| RHEL 7 ELS | firefox | 128.3.0-1.el7_9 | RHSA-2024:7702 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 128.3.0-1.el9_4.alma.1 | ALSA-2024:7552, ALSA-2024:7505 |
| AlmaLinux 8 | firefox +1 | 128.3.0-1.el8_10.alma.1 | ALSA-2024:7700, ALSA-2024:7699 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 128.3.0-1.el8_10 | RLSA-2024:7700, RLSA-2024:7699 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP6 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| SLES 15 SP5 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP5 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| SLES 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 128.3.0-112.228.1 | SUSE-SU-2024:3603-1, SUSE-SU-2024:3518-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 128.3.0-112.228.1 | SUSE-SU-2024:3603-1, SUSE-SU-2024:3518-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 131.0-1.1 | openSUSE-SU-2024:14385-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozjs128 +1 | 128.3.1-1.1 | openSUSE-SU-2024:14397-1, openSUSE-SU-2024:14394-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.16.0-1.amzn2.0.1 | ALAS2-2024-2690 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 128.3.0-1.0.1.el9_4 | ELSA-2024-7552, ELSA-2024-7505 |
| Oracle Linux 8 | firefox +1 | 128.3.0-1.0.1.el8_10 | ELSA-2024-7700, ELSA-2024-7699 |
| Oracle Linux 7 | firefox | 128.3.0-1.0.1.el7_9 | ELSA-2024-7702 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 136.0.2-r0 | — |
Advisories 45
- ALSA-2024:7699 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:7700 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:7552 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:7505 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:7842 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7704 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7702 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7703 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7646 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7700 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7621 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7622 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:8166 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- USN-7056-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RHSA-2024:8169 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7855 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7856 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7853 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7854 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7699 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7505 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7552 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- DSA-5789-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5783-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3916-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3913-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:7699 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:7700 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:14394-1 MozillaThunderbird-128.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3519-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3518-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14397-1 libmozjs-128-0-128.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3603-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3629-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14385-1 MozillaFirefox-131.0-1.1 on GA media 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
- SUSE-SU-2024:3614-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-3057 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 2, 2026
- ALAS2-2024-2690 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 15, 2024
- ELSA-2024-7702 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2024
- ELSA-2024-7700 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 7, 2024
- ELSA-2024-7699 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 7, 2024
- ELSA-2024-7552 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 3, 2024
- NCSC-2024-0387 Kwetsbaarheden verholpen in Mozilla Firefox en Thunderbird NCSC-NL (Netherlands) · Oct 2, 2024
- ELSA-2024-7505 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 2, 2024
References
- Memory safety bugs fixed in Firefox 131, Firefox ESR 115.16, Firefox ESR 128.3, Thunderbird 131, and Thunderbird 128.3
- https://www.mozilla.org/security/advisories/mfsa2024-46/
- https://www.mozilla.org/security/advisories/mfsa2024-47/
- https://www.mozilla.org/security/advisories/mfsa2024-48/
- https://www.mozilla.org/security/advisories/mfsa2024-49/
- https://www.mozilla.org/security/advisories/mfsa2024-50/