Description
It may be possible for an attacker to craft an email message that causes Thunderbird to perform an out-of-bounds write of one byte when processing the message. This vulnerability affects Thunderbird < 91.6.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 91.6.1 | 91.6.1 |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:91.6.1-1 | — |
| Debian 13 | thunderbird | 1:91.6.1-1 | — |
| Debian 12 | thunderbird | 1:91.6.1-1 | — |
| Debian 11 | thunderbird | 1:91.6.1-1~deb11u1 | DSA-5086-1 |
| Debian 10 | thunderbird | 1:91.6.1-1~deb10u1 | DSA-5086-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | thunderbird | 1:91.6.1-1~deb9u1 | DLA-2930-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:91.6.1+build1-0ubuntu1 | — |
| Ubuntu 20.04 LTS | thunderbird | 1:91.7.0+build2-0ubuntu0.20.04.1 | USN-5345-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:91.7.0+build2-0ubuntu0.18.04.1 | USN-5345-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | thunderbird | 91.7.0-2.el8_5 | RHSA-2022:0845 |
| RHEL 7 | thunderbird | 91.7.0-2.el7_9 | RHSA-2022:0850 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | thunderbird | 91.7.0-2.el8_4 | RHSA-2022:0853 |
| RHEL 8.2 EUS | thunderbird | 91.7.0-2.el8_2 | RHSA-2022:0843 |
| RHEL 8.1 E4S | thunderbird | 91.7.0-2.el8_1 | RHSA-2022:0847 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | thunderbird | 91.7.0-2.el8_5.alma | ALSA-2022:0845 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | thunderbird | 91.7.0-2.el8_5 | RLSA-2022:0845 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | MozillaThunderbird | 91.6.1-8.54.1 | SUSE-SU-2022:0559-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.6.1-1.1 | openSUSE-SU-2024:11856-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 91.6.1-8.54.1 | openSUSE-SU-2022:0559-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.22 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.21 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.20 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.19 | thunderbird | 91.6.2-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.17 | thunderbird | 91.6.2-r0 | — |
| Alpine v3.16 | thunderbird | 91.6.2-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 91.7.0-2.amzn2.0.1 | ALAS2-2022-1779 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | thunderbird | 91.7.0-2.0.1.el8_5 | ELSA-2022-0845 |
| Oracle Linux 7 | thunderbird | 91.7.0-2.0.1.el7_9 | ELSA-2022-0850 |
Advisories 19
- ALSA-2022:0845 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:0853 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0847 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0850 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0845 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2022:0843 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- WID-SEC-2022-0432 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 11, 2026
- WID-SEC-2022-0302 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administratorrechten BSI CERT-Bund (WID) · Oct 11, 2026
- USN-5345-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5086-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2930-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:0845 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2022:0559-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0559-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11856-1 MozillaThunderbird-91.6.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1335 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- ALAS2-2022-1779 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 27, 2022
- ELSA-2022-0845 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 14, 2022
- ELSA-2022-0850 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 14, 2022