Description
Memory safety bug present in Firefox 124, Firefox ESR 115.9, and Thunderbird 115.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 125 | 125 |
| Mozilla | Firefox ESR | unspecified – < 115.10 | 115.10 |
| Mozilla | Thunderbird | unspecified – < 115.10 | 115.10 |
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 | 115.10.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.10.1-1 | — |
| Debian 13 | firefox-esr | 115.10.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.10.1-1 | — |
| Debian 12 | firefox-esr | 115.10.0esr-1~deb12u1 | DSA-5663-1 |
| Debian 12 | thunderbird | 1:115.10.1-1~deb12u1 | DSA-5670-1 |
| Debian 11 | firefox-esr | 115.10.0esr-1~deb11u1 | DSA-5663-1 |
| Debian 11 | thunderbird | 1:115.10.1-1~deb11u1 | DSA-5670-1 |
| Debian 10 | firefox-esr | 115.10.0esr-1~deb10u1 | DLA-3790-1 |
| Debian 10 | thunderbird | 1:115.10.1-1~deb10u1 | DLA-3791-1 |
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 | 1:115.10.1+build1-0ubuntu0.22.04.1 | USN-6750-1 |
| Ubuntu 20.04 LTS | firefox | 125.0.2+build1-0ubuntu0.20.04.2 | USN-6747-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.10.1+build1-0ubuntu0.20.04.1 | USN-6750-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +1 | 115.10.0-1.el9_3 | RHSA-2024:1908 |
| RHEL 9 | thunderbird | 115.10.0-2.el9_3 | RHSA-2024:1940 |
| RHEL 8 | firefox | 115.10.0-1.el8_9 | RHSA-2024:1912 |
| RHEL 8 | thunderbird | 115.10.0-2.el8_9 | RHSA-2024:1939 |
| RHEL 7 | firefox | 115.10.0-1.el7_9 | RHSA-2024:1910 |
| RHEL 7 | thunderbird | 115.10.0-2.el7_9 | RHSA-2024:1935 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +1 | 115.10.0-1.el9_2 | RHSA-2024:1905 |
| RHEL 9.2 EUS | thunderbird | 115.10.0-2.el9_2 | RHSA-2024:1941 |
| RHEL 9.0 EUS | firefox | 115.10.0-1.el9_0 | RHSA-2024:1907 |
| RHEL 9.0 EUS | thunderbird | 115.10.0-2.el9_0 | RHSA-2024:1938 |
| RHEL 8.8 EUS | firefox | 115.10.0-1.el8_8 | RHSA-2024:1909 |
| RHEL 8.8 EUS | thunderbird | 115.10.0-2.el8_8 | RHSA-2024:1937 |
| RHEL 8.6 EUS | firefox | 115.10.0-1.el8_6 | RHSA-2024:1906 |
| RHEL 8.6 EUS | thunderbird | 115.10.0-2.el8_6 | RHSA-2024:1936 |
| RHEL 8.4 TUS | firefox | 115.10.0-1.el8_4 | RHSA-2024:1911 |
| RHEL 8.4 TUS | thunderbird | 115.10.0-2.el8_4 | RHSA-2024:1982 |
| RHEL 8.4 E4S | firefox | 115.10.0-1.el8_4 | RHSA-2024:1911 |
| RHEL 8.4 E4S | thunderbird | 115.10.0-2.el8_4 | RHSA-2024:1982 |
| RHEL 8.4 AUS | firefox | 115.10.0-1.el8_4 | RHSA-2024:1911 |
| RHEL 8.4 AUS | thunderbird | 115.10.0-2.el8_4 | RHSA-2024:1982 |
| RHEL 8.2 TUS | firefox | 115.10.0-1.el8_2 | RHSA-2024:1904 |
| RHEL 8.2 TUS | thunderbird | 115.10.0-2.el8_2 | RHSA-2024:1934 |
| RHEL 8.2 E4S | firefox | 115.10.0-1.el8_2 | RHSA-2024:1904 |
| RHEL 8.2 E4S | thunderbird | 115.10.0-2.el8_2 | RHSA-2024:1934 |
| RHEL 8.2 AUS | firefox | 115.10.0-1.el8_2 | RHSA-2024:1904 |
| RHEL 8.2 AUS | thunderbird | 115.10.0-2.el8_2 | RHSA-2024:1934 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 115.10.0-1.el9_3.alma.1 | ALSA-2024:1908 |
| AlmaLinux 9 | thunderbird | 115.10.0-2.el9_3.alma.1 | ALSA-2024:1940 |
| AlmaLinux 8 | firefox | 115.10.0-1.el8_9.alma.1 | ALSA-2024:1912 |
| AlmaLinux 8 | thunderbird | 115.10.0-2.el8_9.alma.1 | ALSA-2024:1939 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox | 115.10.0-1.el9_3 | RLSA-2024:1908 |
| Rocky Linux 8 | firefox | 115.10.0-1.el8_9 | RLSA-2024:1912 |
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 SP5 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.10.1-150200.8.157.1 | SUSE-SU-2024:1437-1 |
| SLES 15 SP4 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES 15 SP3 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES 15 SP2 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.10.0-112.209.1 | SUSE-SU-2024:1676-1, SUSE-SU-2024:1319-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.10.0-112.209.1 | SUSE-SU-2024:1676-1, SUSE-SU-2024:1319-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 125.0.2-1.1 | openSUSE-SU-2024:13907-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.10.1-1.1 | openSUSE-SU-2024:13884-1 |
| 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 15.5 | MozillaFirefox | 115.10.0-150200.152.134.1 | SUSE-SU-2024:1770-1, SUSE-SU-2024:1350-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.10.1-150200.8.157.1 | SUSE-SU-2024:1437-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | thunderbird | 115.10.1-r0 | — |
| Alpine v3.22 | thunderbird | 115.10.1-r0 | — |
| Alpine v3.21 | thunderbird | 115.10.1-r0 | — |
| Alpine v3.20 | thunderbird | 115.10.1-r0 | — |
| Alpine v3.19 | thunderbird | 115.10.1-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | thunderbird | 115.10.1-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +1 | 115.10.0-1.0.1.el9_3 | ELSA-2024-1908 |
| Oracle Linux 8 | firefox | 115.10.0-1.0.1.el8_9 | ELSA-2024-1912 |
| Oracle Linux 7 | firefox | 115.10.0-1.0.1.el7_9 | ELSA-2024-1910 |
Advisories 42
- ALSA-2024:1912 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:1940 Low: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1908 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:1939 Low: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:1982 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1939 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1940 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1941 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1938 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1936 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1937 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1935 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1934 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1912 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1911 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1910 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1909 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1907 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1908 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1905 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1906 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:1904 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6750-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6747-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5663-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3791-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5670-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3790-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:1908 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:1912 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:1350-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1676-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13884-1 MozillaThunderbird-115.10.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1319-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1437-1 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-2024:13907-1 MozillaFirefox-125.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-0909 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 15, 2024
- ELSA-2024-1908 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 19, 2024
- ELSA-2024-1912 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 19, 2024
- ELSA-2024-1910 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 18, 2024
References
- Memory safety bug fixed in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10
- https://lists.debian.org/debian-lts-announce/2024/04/msg00012.html
- https://lists.debian.org/debian-lts-announce/2024/04/msg00013.html
- https://www.mozilla.org/security/advisories/mfsa2024-18/
- https://www.mozilla.org/security/advisories/mfsa2024-19/
- https://www.mozilla.org/security/advisories/mfsa2024-20/