Description
Memory safety bugs present in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10. 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 < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 126 | 126 |
| Mozilla | Firefox ESR | unspecified – < 115.11 | 115.11 |
| Mozilla | Thunderbird | unspecified – < 115.11 | 115.11 |
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 | 115.11.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.11.0-1 | — |
| Debian 13 | firefox-esr | 115.11.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.11.0-1 | — |
| Debian 12 | firefox-esr | 115.11.0esr-1~deb12u1 | DSA-5691-1 |
| Debian 12 | thunderbird | 1:115.11.0-1~deb12u1 | DSA-5693-1 |
| Debian 11 | firefox-esr | 115.11.0esr-1~deb11u1 | DSA-5691-1 |
| Debian 11 | thunderbird | 1:115.11.0-1~deb11u1 | DSA-5693-1 |
| Debian 10 | firefox-esr | 115.11.0esr-1~deb10u1 | DLA-3815-1 |
| Debian 10 | thunderbird | 1:115.11.0-1~deb10u1 | DLA-3817-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:115.11.0+build2-0ubuntu0.22.04.1 | USN-6782-1 |
| Ubuntu 20.04 LTS | firefox | 126.0+build2-0ubuntu0.20.04.1 | USN-6779-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.11.0+build2-0ubuntu0.20.04.1 | USN-6782-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 115.11.0-1.el9_4 | RHSA-2024:2888, RHSA-2024:2883 |
| RHEL 8 | firefox +1 | 115.11.0-1.el8_10 | RHSA-2024:3784, RHSA-2024:3783 |
| RHEL 7 | firefox +1 | 115.11.0-1.el7_9 | RHSA-2024:2913, RHSA-2024:2881 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 115.11.0-1.el9_2 | RHSA-2024:2906, RHSA-2024:2903 |
| RHEL 9.0 EUS | firefox +1 | 115.11.0-1.el9_0 | RHSA-2024:2904, RHSA-2024:2884 |
| RHEL 8.8 EUS | firefox +1 | 115.11.0-1.el8_8 | RHSA-2024:2905, RHSA-2024:2885 |
| RHEL 8.6 EUS | firefox +1 | 115.11.0-1.el8_6 | RHSA-2024:2912, RHSA-2024:2887 |
| RHEL 8.4 TUS | firefox +1 | 115.11.0-1.el8_4 | RHSA-2024:2911, RHSA-2024:2886 |
| RHEL 8.4 E4S | firefox +1 | 115.11.0-1.el8_4 | RHSA-2024:2911, RHSA-2024:2886 |
| RHEL 8.4 AUS | firefox +1 | 115.11.0-1.el8_4 | RHSA-2024:2911, RHSA-2024:2886 |
| RHEL 8.2 AUS | firefox +1 | 115.11.0-1.el8_2 | RHSA-2024:3338, RHSA-2024:2882 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 115.11.0-1.el9_4.alma.1 | ALSA-2024:2888, ALSA-2024:2883 |
| AlmaLinux 8 | firefox +1 | 115.11.0-1.el8_10.alma.1 | ALSA-2024:3784, ALSA-2024:3783 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | thunderbird | 115.11.0-1.el9_4 | RLSA-2024:2888 |
| Rocky Linux 8 | firefox +1 | 115.11.0-1.el8_10 | RLSA-2024:3784, RLSA-2024:3783 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES 15 SP6 | MozillaThunderbird | 115.11.0-150200.8.160.1 | SUSE-SU-2024:1858-1 |
| SLES 15 SP5 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.11.0-150200.8.160.1 | SUSE-SU-2024:1858-1 |
| SLES 15 SP4 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES 15 SP3 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES 15 SP2 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.11.0-112.212.1 | SUSE-SU-2024:1676-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.11.0-112.212.1 | SUSE-SU-2024:1676-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 126.0-1.1 | openSUSE-SU-2024:13980-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.11.0-1.1 | openSUSE-SU-2024:13981-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 115.11.0-150200.8.160.1 | SUSE-SU-2024:1858-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.11.0-150200.152.137.2 | SUSE-SU-2024:1770-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.11.0-150200.8.160.1 | SUSE-SU-2024:1858-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.11.0-1.amzn2.0.1 | ALAS2-2024-2561 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 115.11.0-1.0.1.el9_4 | ELSA-2024-2888, ELSA-2024-2883 |
| Oracle Linux 8 | firefox +1 | 115.11.0-1.0.1.el8_10 | ELSA-2024-3784, ELSA-2024-3783 |
| Oracle Linux 7 | firefox +1 | 115.11.0-1.0.1.el7_9 | ELSA-2024-2913, ELSA-2024-2881 |
Advisories 46
- ALSA-2024:2883 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:2888 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3783 Moderate: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:3784 Moderate: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:3783 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:3784 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:3338 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2913 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2912 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2906 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2911 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2905 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2903 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2904 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2887 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2888 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2886 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2885 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2884 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2882 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2883 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- RHSA-2024:2881 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Aug 26, 2026
- USN-6779-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6782-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5693-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5691-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3817-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3815-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:3783 Moderate: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:3784 Moderate: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:2888 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:1676-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13980-1 MozillaFirefox-126.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1858-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1770-1 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
- openSUSE-SU-2024:13981-1 MozillaThunderbird-115.11.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2024-1151 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 22, 2025
- ALAS2-2024-2561 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 12, 2024
- ELSA-2024-3784 Moderate: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2024
- ELSA-2024-3783 Moderate: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2024
- ELSA-2024-2913 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 20, 2024
- ELSA-2024-2883 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 16, 2024
- ELSA-2024-2888 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 16, 2024
- ELSA-2024-2881 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 16, 2024
- NCSC-2024-0218 Kwetsbaarheden verholpen in Mozilla Firefox en Thunderbird NCSC-NL (Netherlands) · May 15, 2024
References
- Memory safety bugs fixed in Firefox 126, Firefox ESR 115.11, and Thunderbird 115.11
- https://www.mozilla.org/security/advisories/mfsa2024-21/
- https://www.mozilla.org/security/advisories/mfsa2024-22/
- https://www.mozilla.org/security/advisories/mfsa2024-23/
- https://lists.debian.org/debian-lts-announce/2024/05/msg00010.html
- https://lists.debian.org/debian-lts-announce/2024/05/msg00012.html