Description
Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. 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 < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 116 | 116 |
| Mozilla | Firefox ESR | unspecified – < 102.14, unspecified – < 115.1 | 102.14 |
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 | 115.1.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.1.0-1 | — |
| Debian 13 | firefox-esr | 115.1.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.1.0-1 | — |
| Debian 12 | firefox-esr | 102.14.0esr-1~deb12u1 | DSA-5464-1 |
| Debian 12 | thunderbird | 1:102.14.0-1~deb12u1 | DSA-5469-1 |
| Debian 11 | firefox-esr | 102.14.0esr-1~deb11u1 | DSA-5464-1 |
| Debian 11 | thunderbird | 1:102.14.0-1~deb11u1 | DSA-5469-1 |
| Debian 10 | firefox-esr | 102.14.0esr-1~deb10u1 | DLA-3523-1 |
| Debian 10 | thunderbird | 1:102.14.0-1~deb10u1 | DLA-3521-1 |
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 | 1:102.15.0+build1-0ubuntu0.22.04.1 | USN-6333-1 |
| Ubuntu 20.04 LTS | firefox | 116.0+build2-0ubuntu0.20.04.2 | USN-6267-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:102.15.0+build1-0ubuntu0.20.04.1 | USN-6333-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 102.14.0-1.el9_2 | RHSA-2023:4499, RHSA-2023:4462 |
| RHEL 8 | firefox +1 | 102.14.0-1.el8_8 | RHSA-2023:4497, RHSA-2023:4468 |
| RHEL 7 | firefox +1 | 102.14.0-1.el7_9 | RHSA-2023:4495, RHSA-2023:4461 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox +1 | 102.14.0-1.el9_0 | RHSA-2023:4494, RHSA-2023:4465 |
| RHEL 8.6 EUS | firefox +1 | 102.14.0-1.el8_6 | RHSA-2023:4493, RHSA-2023:4463 |
| RHEL 8.4 TUS | firefox +1 | 102.14.0-1.el8_4 | RHSA-2023:4500, RHSA-2023:4469 |
| RHEL 8.4 E4S | firefox +1 | 102.14.0-1.el8_4 | RHSA-2023:4500, RHSA-2023:4469 |
| RHEL 8.4 AUS | firefox +1 | 102.14.0-1.el8_4 | RHSA-2023:4500, RHSA-2023:4469 |
| RHEL 8.2 TUS | firefox +1 | 102.14.0-1.el8_2 | RHSA-2023:4496, RHSA-2023:4460 |
| RHEL 8.2 E4S | firefox +1 | 102.14.0-1.el8_2 | RHSA-2023:4496, RHSA-2023:4460 |
| RHEL 8.2 AUS | firefox +1 | 102.14.0-1.el8_2 | RHSA-2023:4496, RHSA-2023:4460 |
| RHEL 8.1 E4S | firefox +1 | 102.14.0-1.el8_1 | RHSA-2023:4492, RHSA-2023:4464 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 102.14.0-1.el9_2.alma | ALSA-2023:4499, ALSA-2023:4462 |
| AlmaLinux 8 | firefox +1 | 102.14.0-1.el8_8.alma | ALSA-2023:4497, ALSA-2023:4468 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 102.14.0-1.el9_2 | RLSA-2023:4499, RLSA-2023:4462 |
| Rocky Linux 8 | firefox +1 | 102.14.0-1.el8_8 | RLSA-2023:4497, RLSA-2023:4468 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.1.0-150200.8.127.1 | SUSE-SU-2023:3228-1 |
| SLES 15 SP4 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES 15 SP4 | MozillaThunderbird | 115.1.0-150200.8.127.1 | SUSE-SU-2023:3228-1 |
| SLES 15 SP3 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES 15 SP2 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES 15 SP1 | MozillaFirefox | 115.1.0-150000.150.97.1 | SUSE-SU-2023:3163-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.1.0-112.173.1 | SUSE-SU-2023:3161-1 |
| SLES 12 SP2 | MozillaFirefox | 115.1.0-112.173.1 | SUSE-SU-2023:3161-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.1.0-150000.150.97.1 | SUSE-SU-2023:3163-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.1.0-112.173.1 | SUSE-SU-2023:3161-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.1.0-150000.150.97.1 | SUSE-SU-2023:3163-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 116.0.2-1.1 | openSUSE-SU-2024:13124-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 102.14.0-1.1 | openSUSE-SU-2024:13091-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.1.0-150200.8.127.1 | SUSE-SU-2023:3228-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 115.1.0-150200.152.99.1 | SUSE-SU-2023:3162-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 115.1.0-150200.8.127.1 | SUSE-SU-2023:3228-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 115.1.0-r0 | — |
| Alpine v3.22 | firefox-esr | 115.1.0-r0 | — |
| Alpine v3.21 | firefox-esr | 115.1.0-r0 | — |
| Alpine v3.20 | firefox-esr | 115.1.0-r0 | — |
| Alpine v3.19 | firefox-esr | 115.1.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 115.1.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.15.0-1.amzn2.0.1 | ALAS2-2023-2248 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 102.14.0-1.0.1.el9_2 | ELSA-2023-4499, ELSA-2023-4462 |
| Oracle Linux 8 | firefox +1 | 102.14.0-1.0.1.el8_8 | ELSA-2023-4497, ELSA-2023-4468 |
| Oracle Linux 7 | firefox +1 | 102.14.0-1.0.1.el7_9 | ELSA-2023-4495, ELSA-2023-4461 |
Advisories 46
- ALSA-2023:4462 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4499 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4468 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4497 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2023-2917 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2026
- RHSA-2023:4500 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4499 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4497 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4495 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4496 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4493 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4494 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4492 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4468 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4469 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4465 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4463 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4464 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4462 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4461 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4460 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6333-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6267-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5469-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5464-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3523-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3521-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2023:4497 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:4499 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:4468 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:4462 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:13091-1 MozillaThunderbird-102.14.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3162-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3163-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13124-1 MozillaFirefox-116.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3228-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3161-1 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
- WID-SEC-2023-1934 Mozilla Firefox und Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 3, 2024
- ALAS2-2023-2248 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 20, 2023
- ELSA-2023-4497 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 9, 2023
- ELSA-2023-4499 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 8, 2023
- ELSA-2023-4495 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 8, 2023
- ELSA-2023-4461 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 6, 2023
- ELSA-2023-4462 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 4, 2023
- ELSA-2023-4468 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 4, 2023
References
- Memory safety bugs fixed in Firefox 116, Firefox ESR 115.1, Firefox ESR 102.14, Thunderbird 115.1, and Thunderbird 102.14
- https://www.mozilla.org/security/advisories/mfsa2023-29/
- https://www.mozilla.org/security/advisories/mfsa2023-30/
- https://www.mozilla.org/security/advisories/mfsa2023-31/
- https://www.debian.org/security/2023/dsa-5464
- https://www.debian.org/security/2023/dsa-5469
- https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html
- https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html