Description
Memory safety bugs present in Firefox 116, Firefox ESR 115.1, and Thunderbird 115.1. 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 < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 117 | 117 |
| Mozilla | Firefox ESR | unspecified – < 115.2 | 115.2 |
| Mozilla | Thunderbird | unspecified – < 115.2 | 115.2 |
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 | 115.2.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.2.0-1 | — |
| Debian 13 | firefox-esr | 115.2.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.2.0-1 | — |
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 | 1:115.3.1+build1-0ubuntu0.22.04.2 | USN-6405-1 |
| Ubuntu 20.04 LTS | firefox | 117.0+build2-0ubuntu0.20.04.1 | USN-6320-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.20.04.1 | USN-6405-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 102.15.0-1.el9_2 | RHSA-2023:4958, RHSA-2023:4955 |
| RHEL 8 | firefox +1 | 102.15.0-1.el8_8 | RHSA-2023:4954, RHSA-2023:4952 |
| RHEL 7 | firefox +1 | 102.15.0-1.el7_9 | RHSA-2023:5019, RHSA-2023:4945 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox +1 | 102.15.0-1.el9_0 | RHSA-2023:4950, RHSA-2023:4947 |
| RHEL 8.6 EUS | firefox | 102.15.0-1.el8_6 | RHSA-2023:4959 |
| RHEL 8.4 TUS | firefox +1 | 102.15.0-1.el8_4 | RHSA-2023:4957, RHSA-2023:4956 |
| RHEL 8.4 E4S | firefox +1 | 102.15.0-1.el8_4 | RHSA-2023:4957, RHSA-2023:4956 |
| RHEL 8.4 AUS | firefox +1 | 102.15.0-1.el8_4 | RHSA-2023:4957, RHSA-2023:4956 |
| RHEL 8.2 TUS | firefox +1 | 102.15.0-1.el8_2 | RHSA-2023:4951, RHSA-2023:4946 |
| RHEL 8.2 E4S | firefox +1 | 102.15.0-1.el8_2 | RHSA-2023:4951, RHSA-2023:4946 |
| RHEL 8.2 AUS | firefox +1 | 102.15.0-1.el8_2 | RHSA-2023:4951, RHSA-2023:4946 |
| RHEL 8.1 E4S | firefox +1 | 102.15.0-1.el8_1 | RHSA-2023:4949, RHSA-2023:4948 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 102.15.0-1.el9_2.alma | ALSA-2023:4958, ALSA-2023:4955 |
| AlmaLinux 8 | firefox +1 | 102.15.0-1.el8_8.alma | ALSA-2023:4954, ALSA-2023:4952 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 102.15.0-1.el8_8 | RLSA-2023:4954, RLSA-2023:4952 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.2.2-150200.8.130.1 | SUSE-SU-2023:3664-1 |
| SLES 15 SP4 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES 15 SP4 | MozillaThunderbird | 115.2.2-150200.8.130.1 | SUSE-SU-2023:3664-1 |
| SLES 15 SP3 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES 15 SP2 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES 15 SP1 | MozillaFirefox | 115.2.0-150000.150.100.1 | SUSE-SU-2023:3562-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.2.0-112.176.1 | SUSE-SU-2023:3559-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.2.0-150000.150.100.1 | SUSE-SU-2023:3562-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.2.0-112.176.1 | SUSE-SU-2023:3559-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.2.0-150000.150.100.1 | SUSE-SU-2023:3562-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 117.0-1.1 | openSUSE-SU-2024:13176-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.2.0-1.1 | openSUSE-SU-2024:13202-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.2.2-150200.8.130.1 | SUSE-SU-2023:3664-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 115.2.0-150200.152.102.1 | SUSE-SU-2023:3519-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 115.2.2-150200.8.130.1 | SUSE-SU-2023:3664-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 115.2.0-r0 | — |
| Alpine v3.22 | firefox-esr | 115.2.0-r0 | — |
| Alpine v3.21 | firefox-esr | 115.2.0-r0 | — |
| Alpine v3.20 | firefox-esr | 115.2.0-r0 | — |
| Alpine v3.19 | firefox-esr | 115.2.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 115.2.0-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 102.15.0-1.0.1.el9_2 | ELSA-2023-4958, ELSA-2023-4955 |
| Oracle Linux 8 | firefox +1 | 102.15.0-1.0.1.el8_8 | ELSA-2023-4954, ELSA-2023-4952 |
| Oracle Linux 7 | firefox +1 | 102.15.0-1.0.1.el7_9 | ELSA-2023-5019, ELSA-2023-4945 |
Advisories 37
- ALSA-2023:4958 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4955 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4952 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:4954 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:5019 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:4945 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6405-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6320-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RLSA-2023:4952 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:4954 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2023:3559-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3562-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13202-1 MozillaThunderbird-115.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3664-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13176-1 MozillaFirefox-117.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:3519-1 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
- RHSA-2023:4959 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4958 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4956 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4957 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4954 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4955 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4951 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4952 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4950 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4948 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4949 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4947 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:4946 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-2202 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 15, 2024
- ELSA-2023-5019 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 7, 2023
- ELSA-2023-4955 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 6, 2023
- ELSA-2023-4958 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 6, 2023
- ELSA-2023-4954 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 6, 2023
- ELSA-2023-4952 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 6, 2023
- ELSA-2023-4945 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 5, 2023