Description
Memory safety bugs present in Firefox 127, Firefox ESR 115.12, and Thunderbird 115.12. 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 < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 128 | 128 |
| Mozilla | Firefox ESR | unspecified – < 115.13 | 115.13 |
| Mozilla | Thunderbird | unspecified – < 115.13, unspecified – < 128 | 115.13 |
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 | 115.13.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.13.0-1 | — |
| Debian 13 | firefox-esr | 115.13.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.13.0-1 | — |
| Debian 12 | firefox-esr | 115.13.0esr-1~deb12u1 | DSA-5727-1 |
| Debian 12 | thunderbird | 1:115.13.0-1~deb12u1 | DSA-5733-1 |
| Debian 11 | firefox-esr | 115.13.0esr-1~deb11u1 | DSA-5727-1 |
| Debian 11 | thunderbird | 1:115.13.0-1~deb11u1 | DSA-5733-1 |
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 | 1:115.13.0+build5-0ubuntu0.22.04.1 | USN-6903-1 |
| Ubuntu 20.04 LTS | firefox | 128.0+build2-0ubuntu0.20.04.1 | USN-6890-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.13.0+build5-0ubuntu0.20.04.1 | USN-6903-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 115.13.0-3.el9_4 | RHSA-2024:4624, RHSA-2024:4500 |
| RHEL 8 | firefox +1 | 115.13.0-3.el8_10 | RHSA-2024:4635, RHSA-2024:4517 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 115.13.0-3.el9_2 | RHSA-2024:4673, RHSA-2024:4670 |
| RHEL 9.0 E4S | firefox +1 | 115.13.0-3.el9_0 | RHSA-2024:4625, RHSA-2024:4501 |
| RHEL 8.8 EUS | firefox +1 | 115.13.0-3.el8_8 | RHSA-2024:4718, RHSA-2024:4590 |
| RHEL 8.6 TUS | firefox +1 | 115.13.0-3.el8_6 | RHSA-2024:4894, RHSA-2024:4634 |
| RHEL 8.6 E4S | firefox +1 | 115.13.0-3.el8_6 | RHSA-2024:4894, RHSA-2024:4634 |
| RHEL 8.6 AUS | firefox +1 | 115.13.0-3.el8_6 | RHSA-2024:4894, RHSA-2024:4634 |
| RHEL 8.4 TUS | firefox +1 | 115.13.0-3.el8_4 | RHSA-2024:4671, RHSA-2024:4610 |
| RHEL 8.4 E4S | firefox +1 | 115.13.0-3.el8_4 | RHSA-2024:4671, RHSA-2024:4610 |
| RHEL 8.4 AUS | firefox +1 | 115.13.0-3.el8_4 | RHSA-2024:4671, RHSA-2024:4610 |
| RHEL 8.2 AUS | firefox +1 | 115.13.0-3.el8_2 | RHSA-2024:4717, RHSA-2024:4586 |
| RHEL 7 ELS | firefox | 115.13.0-3.el7_9 | RHSA-2024:4508 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 115.13.0-3.el9_4.alma.1 | ALSA-2024:4624, ALSA-2024:4500 |
| AlmaLinux 8 | firefox +1 | 115.13.0-3.el8_10.alma.1 | ALSA-2024:4635, ALSA-2024:4517 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 115.13.0-3.el9_4 | RLSA-2024:4624, RLSA-2024:4500 |
| Rocky Linux 8 | firefox +1 | 115.13.0-3.el8_10 | RLSA-2024:4635, RLSA-2024:4517 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES 15 SP6 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES 15 SP6 | MozillaThunderbird | 115.13.0-150200.8.171.4 | SUSE-SU-2024:3507-1, SUSE-SU-2024:2790-1 |
| SLES 15 SP5 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES 15 SP5 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.13.0-150200.8.171.4 | SUSE-SU-2024:3507-1, SUSE-SU-2024:2790-1 |
| SLES 15 SP4 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES 15 SP4 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES 15 SP3 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES 15 SP3 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES 15 SP2 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES 15 SP2 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.13.0-112.218.1 | SUSE-SU-2024:2876-1, SUSE-SU-2024:2371-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 128-35.15.1 | SUSE-SU-2024:2876-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES for SAP 15 SP4 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES for SAP 15 SP3 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLES for SAP 15 SP2 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.13.0-112.218.1 | SUSE-SU-2024:2876-1, SUSE-SU-2024:2371-1 |
| SLES for SAP 12 SP5 | MozillaFirefox-branding-SLE | 128-35.15.1 | SUSE-SU-2024:2876-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLE HPC 15 SP4 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLE HPC 15 SP3 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SLE HPC 15 SP2 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 128.0-1.1 | openSUSE-SU-2024:14197-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.13.0-1.1 | openSUSE-SU-2024:14189-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| openSUSE Leap 15.6 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 115.13.0-150200.8.171.4 | SUSE-SU-2024:3507-1, SUSE-SU-2024:2790-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.13.0-150200.152.143.1 | SUSE-SU-2024:3003-1, SUSE-SU-2024:2399-1 |
| openSUSE Leap 15.5 | MozillaFirefox-branding-SLE | 128-150200.9.16.1 | SUSE-SU-2024:3003-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.13.0-150200.8.171.4 | SUSE-SU-2024:3507-1, SUSE-SU-2024:2790-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.13.0-1.amzn2.0.1 | ALAS2-2024-2640 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 115.13.0-3.0.1.el9_4 | ELSA-2024-4624, ELSA-2024-4500 |
| Oracle Linux 8 | firefox +1 | 115.13.0-3.0.1.el8_10 | ELSA-2024-4635, ELSA-2024-4517 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 128.0-r0 | — |
Advisories 44
- RHSA-2024:4717 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2024:4671 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALSA-2024:4500 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:4624 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:4517 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:4635 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:4508 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6890-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6903-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RHSA-2024:4894 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4718 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4625 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4634 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4670 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4673 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4610 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4624 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4635 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4586 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4590 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4517 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4500 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:4501 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- DSA-5733-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5727-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:4635 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:4500 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:4624 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2024:2876-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14189-1 MozillaThunderbird-115.13.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14197-1 MozillaFirefox-128.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2399-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2371-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3003-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3507-1 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
- SUSE-SU-2024:2790-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2024:4517 Important: firefox security update Rocky Linux Security Advisories · May 7, 2025
- WID-SEC-2024-1568 Mozilla Firefox und Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 16, 2025
- ALAS2-2024-2640 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2024
- ELSA-2024-4624 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 18, 2024
- ELSA-2024-4635 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 18, 2024
- ELSA-2024-4500 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 11, 2024
- ELSA-2024-4517 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 11, 2024
References
- Memory safety bugs fixed in Firefox 128, Firefox ESR 115.13, Thunderbird 128, and Thunderbird 115.13
- https://www.mozilla.org/security/advisories/mfsa2024-29/
- https://www.mozilla.org/security/advisories/mfsa2024-30/
- https://www.mozilla.org/security/advisories/mfsa2024-31/
- https://www.mozilla.org/security/advisories/mfsa2024-32/