Description
Memory safety bugs present in Firefox 114, Firefox ESR 102.12, and Thunderbird 102.12. 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 < 115, Firefox ESR < 102.13, and Thunderbird < 102.13.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 115 | 115 |
| Mozilla | Firefox ESR | unspecified – < 102.13 | 102.13 |
| Mozilla | Thunderbird | unspecified – < 102.13 | 102.13 |
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 | 102.13.0esr-1 | — |
| Debian 14 | thunderbird | 1:102.13.0-1 | — |
| Debian 13 | firefox-esr | 102.13.0esr-1 | — |
| Debian 13 | thunderbird | 1:102.13.0-1 | — |
| Debian 12 | firefox-esr | 102.13.0esr-1~deb12u1 | DSA-5450-1 |
| Debian 12 | thunderbird | 1:102.13.0-1~deb12u1 | DSA-5451-1 |
| Debian 11 | firefox-esr | 102.13.0esr-1~deb11u1 | DSA-5450-1 |
| Debian 11 | thunderbird | 1:102.13.0-1~deb11u1 | DSA-5451-1 |
| Debian 10 | firefox-esr | 102.13.0esr-1~deb10u1 | DLA-3484-1 |
| Debian 10 | thunderbird | 1:102.13.0-1~deb10u1 | DLA-3490-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | mozjs102 | 102.13.0-0ubuntu0.22.04.1 | USN-6227-1 |
| Ubuntu 22.04 LTS | mozjs78 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:102.13.0+build1-0ubuntu0.22.04.1 | USN-6214-1 |
| Ubuntu 20.04 LTS | firefox | 115.0+build2-0ubuntu0.20.04.3 | USN-6201-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:102.13.0+build1-0ubuntu0.20.04.1 | USN-6214-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 102.13.0-2.el9_2 | RHSA-2023:4071, RHSA-2023:4064 |
| RHEL 8 | firefox +1 | 102.13.0-2.el8_8 | RHSA-2023:4076, RHSA-2023:4063 |
| RHEL 7 | firefox +1 | 102.13.0-2.el7_9 | RHSA-2023:4079, RHSA-2023:4062 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox +1 | 102.13.0-2.el9_0 | RHSA-2023:4073, RHSA-2023:4066 |
| RHEL 8.6 EUS | firefox +1 | 102.13.0-2.el8_6 | RHSA-2023:4069, RHSA-2023:4067 |
| RHEL 8.4 TUS | firefox +1 | 102.13.0-2.el8_4 | RHSA-2023:4075, RHSA-2023:4074 |
| RHEL 8.4 E4S | firefox +1 | 102.13.0-2.el8_4 | RHSA-2023:4075, RHSA-2023:4074 |
| RHEL 8.4 AUS | firefox +1 | 102.13.0-2.el8_4 | RHSA-2023:4075, RHSA-2023:4074 |
| RHEL 8.2 TUS | firefox +1 | 102.13.0-2.el8_2 | RHSA-2023:4070, RHSA-2023:4068 |
| RHEL 8.2 E4S | firefox +1 | 102.13.0-2.el8_2 | RHSA-2023:4070, RHSA-2023:4068 |
| RHEL 8.2 AUS | firefox +1 | 102.13.0-2.el8_2 | RHSA-2023:4070, RHSA-2023:4068 |
| RHEL 8.1 E4S | firefox +1 | 102.13.0-2.el8_1 | RHSA-2023:4072, RHSA-2023:4065 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 102.13.0-2.el9_2.alma | ALSA-2023:4071, ALSA-2023:4064 |
| AlmaLinux 8 | firefox +1 | 102.13.0-2.el8_8.alma | ALSA-2023:4076, ALSA-2023:4063 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox | 102.13.0-2.el9_2 | RLSA-2023:4071 |
| Rocky Linux 8 | firefox +1 | 102.13.0-2.el8_8 | RLSA-2023:4076, RLSA-2023:4063 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP5 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP4 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP4 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP3 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP3 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP2 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP2 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES 15 SP1 | MozillaFirefox | 115.0-150000.150.91.1 | SUSE-SU-2023:2849-1 |
| SLES 15 SP1 | MozillaFirefox-branding-SLE | 115-150000.4.25.1 | SUSE-SU-2023:2849-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SLES 12 SP4 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SLES 12 SP4 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SLES 12 SP2 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SLES 12 SP2 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES for SAP 15 SP3 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLES for SAP 15 SP2 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.0-150000.150.91.1 | SUSE-SU-2023:2849-1 |
| SLES for SAP 15 SP1 | MozillaFirefox-branding-SLE | 115-150000.4.25.1 | SUSE-SU-2023:2849-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SLES for SAP 12 SP5 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SLES for SAP 12 SP4 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLE Real Time 15 SP3 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLE HPC 15 SP3 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SLE HPC 15 SP2 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.0-150000.150.91.1 | SUSE-SU-2023:2849-1 |
| SLE HPC 15 SP1 | MozillaFirefox-branding-SLE | 115-150000.4.25.1 | SUSE-SU-2023:2849-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 115.0-112.165.1 | SUSE-SU-2023:2850-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox-branding-SLE | 115-35.12.2 | SUSE-SU-2023:2850-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 115.0-1.1 | openSUSE-SU-2024:13037-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.13.0-1.1 | openSUSE-SU-2024:13040-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| openSUSE Leap 15.5 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 115.0-150200.152.93.1 | SUSE-SU-2023:2886-1 |
| openSUSE Leap 15.4 | MozillaFirefox-branding-SLE | 115-150200.9.13.1 | SUSE-SU-2023:2886-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 115.0-r0 | — |
| Alpine v3.22 | firefox-esr | 115.0-r0 | — |
| Alpine v3.21 | firefox-esr | 115.0-r0 | — |
| Alpine v3.20 | firefox-esr | 115.0-r0 | — |
| Alpine v3.19 | firefox-esr | 115.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 115.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.13.0-2.amzn2.0.1 | ALAS2-2023-2156 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 102.13.0-2.0.1.el9_2 | ELSA-2023-4071, ELSA-2023-4064 |
| Oracle Linux 8 | firefox +1 | 102.13.0-2.0.1.el8_8 | ELSA-2023-4076, ELSA-2023-4063 |
| Oracle Linux 7 | firefox +1 | 102.13.0-2.0.1.el7_9 | ELSA-2023-4079, ELSA-2023-4062 |
Advisories 46
- ALSA-2023:4071 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4064 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4063 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4076 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-2031 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2023-2917 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2026
- RHSA-2023:4079 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4062 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6201-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6214-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6227-1 mozjs102 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5451-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5450-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3490-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3484-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:4063 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:4071 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:4076 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:13040-1 MozillaThunderbird-102.13.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2849-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2886-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13037-1 MozillaFirefox-115.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2850-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE 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
- RHSA-2023:4075 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4076 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4073 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4074 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4072 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4071 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4069 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4070 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4067 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4068 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4066 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4064 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4065 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4063 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-1663 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 18, 2024
- ALAS2-2023-2156 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 25, 2023
- ELSA-2023-4079 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 21, 2023
- ELSA-2023-4062 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 21, 2023
- ELSA-2023-4071 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2023
- ELSA-2023-4064 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 17, 2023
- ELSA-2023-4076 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 17, 2023
- ELSA-2023-4063 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 17, 2023
References
- Memory safety bugs fixed in Firefox 115, Firefox ESR 102.13, and Thunderbird 102.13
- https://www.mozilla.org/security/advisories/mfsa2023-22/
- https://www.mozilla.org/security/advisories/mfsa2023-23/
- https://www.mozilla.org/security/advisories/mfsa2023-24/
- https://lists.debian.org/debian-lts-announce/2023/07/msg00006.html
- https://www.debian.org/security/2023/dsa-5450
- https://www.debian.org/security/2023/dsa-5451
- https://lists.debian.org/debian-lts-announce/2023/07/msg00015.html