Description
<code>NSSToken</code> objects were referenced via direct points, and could have been accessed in an unsafe way on different threads, leading to a use-after-free and potentially exploitable crash. This vulnerability affects Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 91.8 | 91.8 |
| Mozilla | Firefox | unspecified – < 99 | 99 |
| Mozilla | Firefox ESR | unspecified – < 91.8 | 91.8 |
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 | 91.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:91.8.0-1 | — |
| Debian 13 | firefox-esr | 91.8.0esr-1 | — |
| Debian 13 | thunderbird | 1:91.8.0-1 | — |
| Debian 12 | firefox-esr | 91.8.0esr-1 | — |
| Debian 12 | thunderbird | 1:91.8.0-1 | — |
| Debian 11 | firefox-esr | 91.8.0esr-1~deb11u1 | DSA-5113-1 |
| Debian 11 | thunderbird | 1:91.8.0-1~deb11u1 | DSA-5118-1 |
| Debian 10 | firefox-esr | 91.8.0esr-1~deb10u1 | DSA-5113-1 |
| Debian 10 | thunderbird | 1:91.8.0-1~deb10u1 | DSA-5118-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | firefox-esr | 91.8.0esr-1~deb9u1 | DLA-2971-1 |
| Debian 9 | thunderbird | 1:91.8.0-1~deb9u1 | DLA-2978-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | firefox | 1:1snap1-0ubuntu1 | — |
| Ubuntu 20.04 LTS | firefox | 99.0+build2-0ubuntu0.20.04.2 | USN-5370-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:91.8.1+build1-0ubuntu0.20.04.1 | USN-5393-1 |
| Ubuntu 18.04 LTS | firefox | 99.0+build2-0ubuntu0.18.04.2 | USN-5370-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:91.8.1+build1-0ubuntu0.18.04.1 | USN-5393-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | firefox +1 | 91.8.0-1.el8_5 | RHSA-2022:1301, RHSA-2022:1287 |
| RHEL 7 | firefox +1 | 91.8.0-1.el7_9 | RHSA-2022:1302, RHSA-2022:1284 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | firefox +1 | 91.8.0-1.el8_4 | RHSA-2022:1305, RHSA-2022:1285 |
| RHEL 8.2 EUS | firefox +1 | 91.8.0-1.el8_2 | RHSA-2022:1326, RHSA-2022:1286 |
| RHEL 8.1 E4S | firefox +1 | 91.8.0-1.el8_1 | RHSA-2022:1303, RHSA-2022:1283 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | firefox +1 | 91.8.0-1.el8_5.alma | ALSA-2022:1301, ALSA-2022:1287 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 91.8.0-1.el8_5 | RLSA-2022:1301, RLSA-2022:1287 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaThunderbird | 91.8.0-150200.8.65.1 | SUSE-SU-2022:1176-1 |
| SLES 15 SP3 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SLES 15 SP3 | MozillaThunderbird | 91.8.0-150200.8.65.1 | SUSE-SU-2022:1176-1 |
| SLES 15 SP3 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES 15 SP2 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SLES 15 SP2 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES 15 SP1 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLES 15 SP1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES 15 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLES 15 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
Show 29 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES 12 SP5 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES 12 SP4 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES 12 SP4 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES 12 SP3 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES 12 SP3 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES 12 SP2 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES 12 SP2 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES 11 SP4 | MozillaFirefox | 91.8.0-78.170.1 | SUSE-RU-2022:14935-1 |
| SLES 11 SP4 | mozilla-nss | 3.68.3-47.25.1 | SUSE-SU-2022:14936-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SLES for SAP 15 SP2 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLES for SAP 15 SP1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES for SAP 15 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLES for SAP 15 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES for SAP 12 SP5 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES for SAP 12 SP4 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SLES for SAP 12 SP3 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SLE Real Time 15 SP2 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SLE Real Time 15 SP2 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE Micro 5.2 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE Micro 5.1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE Micro 5.0 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SLE HPC 15 SP2 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLE HPC 15 SP1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SLE HPC 15 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SLE HPC 15 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SUSE OpenStack Cloud Crowbar 9 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SUSE OpenStack Cloud Crowbar 8 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SUSE OpenStack Cloud 9 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SUSE OpenStack Cloud 8 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SUSE Manager Server 4.1 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SUSE Manager Server 4.1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SUSE Manager Retail Branch Server 4.1 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SUSE Manager Retail Branch Server 4.1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SUSE Manager Proxy 4.1 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SUSE Manager Proxy 4.1 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nss | 3.68.3-47.25.1 | SUSE-SU-2022:14936-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 91.8.0-112.98.1 | SUSE-RU-2022:1114-1 |
| SUSE HPE Helion OpenStack 8 | mozilla-nss | 3.68.3-58.69.1 | SUSE-SU-2022:1113-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 91.8.0-150200.152.26.1 | SUSE-SU-2022:1127-1 |
| SUSE Enterprise Storage 7 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
| SUSE Enterprise Storage 6 | MozillaFirefox | 91.8.0-150000.150.27.1 | SUSE-RU-2022:1125-1 |
| SUSE Enterprise Storage 6 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 99.0-1.1 | openSUSE-SU-2024:11975-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.3 | MozillaFirefox | 91.8.0-150200.152.26.1 | openSUSE-SU-2022:1127-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 91.8.0-150200.8.65.1 | SUSE-SU-2022:1176-1 |
| openSUSE Leap 15.3 | mozilla-nss | 3.68.3-150000.3.67.1 | SUSE-SU-2022:1149-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | librewolf | 99.0-r0 | — |
| Alpine v3.24 | nss | 3.76.1-r0 | — |
| Alpine v3.23 | firefox +1 | 99.0-r0 | — |
| Alpine v3.23 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.23 | nss | 3.76.1-r0 | — |
| Alpine v3.22 | firefox +1 | 99.0-r0 | — |
| Alpine v3.22 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.22 | nss | 3.76.1-r0 | — |
| Alpine v3.21 | firefox +1 | 99.0-r0 | — |
| Alpine v3.21 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.21 | nss | 3.76.1-r0 | — |
| Alpine v3.20 | firefox | 99.0-r0 | — |
| Alpine v3.20 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.20 | nss | 3.76.1-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | firefox | 99.0-r0 | — |
| Alpine v3.19 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.19 | nss | 3.76.1-r0 | — |
| Alpine v3.18 | firefox | 99.0-r0 | — |
| Alpine v3.18 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.18 | nss | 3.76.1-r0 | — |
| Alpine v3.17 | firefox | 99.0-r0 | — |
| Alpine v3.17 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.17 | nss | 3.76.1-r0 | — |
| Alpine v3.16 | firefox | 99.0-r0 | — |
| Alpine v3.16 | firefox-esr +1 | 91.8.0-r0 | — |
| Alpine v3.16 | nss | 3.76.1-r0 | — |
| Alpine v3.15 | firefox-esr | 91.8.0-r0 | — |
| Alpine v3.15 | nss | 3.72.1-r1 | — |
| Alpine v3.14 | nss | 3.68.3-r0 | — |
| Alpine v3.13 | nss | 3.68.3-r0 | — |
| Alpine v3.12 | nss | 3.68.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 91.8.0-1.amzn2.0.1 | ALAS2-2022-1789 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | firefox +1 | 91.8.0-1.0.1.el8_5 | ELSA-2022-1301, ELSA-2022-1287 |
| Oracle Linux 7 | firefox +1 | 91.8.0-1.0.1.el7_9 | ELSA-2022-1302, ELSA-2022-1284 |
Advisories 39
- ALSA-2022:1287 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2022:1301 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:1302 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2022:1284 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5370-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-5393-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5118-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5113-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2978-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2971-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:1287 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:1301 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:11975-1 MozillaFirefox-99.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1127-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:14936-1 Security update for mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1149-1 Security update for mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-RU-2022:1114-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1113-1 Security update for mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:1127-1 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-2022:1326 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1303 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1305 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1301 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1287 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1286 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1285 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1283 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2022-0482 Mozilla Firefox, Mozilla Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2025
- WID-SEC-2022-1335 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- SUSE-SU-2022:1176-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-RU-2022:14935-1 Recommended update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-RU-2022:1125-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-0838 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 3, 2023
- ALAS2-2022-1789 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 27, 2022
- ELSA-2022-1302 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 12, 2022
- ELSA-2022-1301 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 11, 2022
- ELSA-2022-1287 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 8, 2022
- ELSA-2022-1284 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 8, 2022