Description
During the worker lifecycle, a use-after-free condition could have occurred, which could have led to a potentially exploitable crash. This vulnerability affects Firefox < 115.0.2, Firefox ESR < 115.0.2, and Thunderbird < 115.0.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 115.0.2 | 115.0.2 |
| Mozilla | Firefox ESR | unspecified – < 115.0.2 | 115.0.2 |
| Mozilla | Thunderbird | unspecified – < 115.0.1 | 115.0.1 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.22.04.2 | USN-6405-1 |
| Ubuntu 20.04 LTS | firefox | 115.0.2+build1-0ubuntu0.20.04.1 | USN-6218-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:115.3.1+build1-0ubuntu0.20.04.1 | USN-6405-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 115.3.1-1.el9_2 | RHSA-2023:5435, RHSA-2023:5434 |
| RHEL 8 | firefox +1 | 115.3.1-1.el8_8 | RHSA-2023:5433, RHSA-2023:5428 |
| RHEL 7 | firefox +1 | 115.3.1-1.el7_9 | RHSA-2023:5477, RHSA-2023:5475 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox +1 | 115.3.1-1.el9_0 | RHSA-2023:5439, RHSA-2023:5427 |
| RHEL 8.6 EUS | firefox +1 | 115.3.1-1.el8_6 | RHSA-2023:5436, RHSA-2023:5430 |
| RHEL 8.4 TUS | firefox +1 | 115.3.1-1.el8_4 | RHSA-2023:5437, RHSA-2023:5429 |
| RHEL 8.4 E4S | firefox +1 | 115.3.1-1.el8_4 | RHSA-2023:5437, RHSA-2023:5429 |
| RHEL 8.4 AUS | firefox +1 | 115.3.1-1.el8_4 | RHSA-2023:5437, RHSA-2023:5429 |
| RHEL 8.2 TUS | firefox +1 | 115.3.1-1.el8_2 | RHSA-2023:5432, RHSA-2023:5426 |
| RHEL 8.2 E4S | firefox +1 | 115.3.1-1.el8_2 | RHSA-2023:5432, RHSA-2023:5426 |
| RHEL 8.2 AUS | firefox +1 | 115.3.1-1.el8_2 | RHSA-2023:5432, RHSA-2023:5426 |
| RHEL 8.1 E4S | firefox +1 | 115.3.1-1.el8_1 | RHSA-2023:5440, RHSA-2023:5438 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 115.3.1-1.el9_2.alma.1 | ALSA-2023:5434 |
| AlmaLinux 9 | thunderbird | 115.3.1-1.el9_2.alma | ALSA-2023:5435 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | thunderbird | 115.3.1-1.el9_2 | RLSA-2023:5435 |
| Rocky Linux 8 | thunderbird | 115.3.1-1.el8_8 | RLSA-2023:5428 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.0.1-150200.8.124.1 | SUSE-SU-2023:3059-1 |
| SLES 15 SP4 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES 15 SP4 | MozillaThunderbird | 115.0.1-150200.8.124.1 | SUSE-SU-2023:3059-1 |
| SLES 15 SP3 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES 15 SP2 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES 15 SP1 | MozillaFirefox | 115.0.2-150000.150.94.1 | SUSE-SU-2023:2960-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SLES 12 SP4 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SLES 12 SP2 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.0.2-150000.150.94.1 | SUSE-SU-2023:2960-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.0.2-150000.150.94.1 | SUSE-SU-2023:2960-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 115.0.2-112.170.2 | SUSE-SU-2023:2959-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 115.0.2-1.1 | openSUSE-SU-2024:13048-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.0.1-150200.8.124.1 | SUSE-SU-2023:3059-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 115.0.2-150200.152.96.1 | SUSE-SU-2023:2958-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 115.0.1-150200.8.124.1 | SUSE-SU-2023:3059-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 115.0.2-r0 | — |
| Alpine v3.22 | firefox-esr | 115.0.2-r0 | — |
| Alpine v3.21 | firefox-esr | 115.0.2-r0 | — |
| Alpine v3.20 | firefox-esr | 115.0.2-r0 | — |
| Alpine v3.19 | firefox-esr | 115.0.2-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 115.0.2-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 115.3.1-1.0.1.el9_2 | ELSA-2023-5435, ELSA-2023-5434 |
| Oracle Linux 8 | firefox +1 | 115.3.1-1.0.1.el8_8 | ELSA-2023-5433, ELSA-2023-5428 |
| Oracle Linux 7 | firefox +1 | 115.3.1-1.0.1.el7_9 | ELSA-2023-5477, ELSA-2023-5475 |
Advisories 37
- ALSA-2023:5434 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:5435 Important: thunderbird 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
- RHSA-2023:5477 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:5475 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-6218-1 firefox vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- RHSA-2023:5433 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5438 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5440 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5426 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5435 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5436 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5428 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5437 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5430 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5439 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5434 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5427 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5429 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2023:5432 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RLSA-2023:5435 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:5428 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2023:3059-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2958-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2959-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:2960-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13048-1 MozillaFirefox-115.0.2-1.1 on GA media 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-2023-1866 Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 18, 2024
- ELSA-2023-5475 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 13, 2023
- ELSA-2023-5477 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 13, 2023
- WID-SEC-2023-1716 Mozilla Firefox: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 12, 2023
- ELSA-2023-5428 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 6, 2023
- ELSA-2023-5433 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 6, 2023
- ELSA-2023-5435 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 5, 2023
- ELSA-2023-5434 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 5, 2023