Description
An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 102.3 | 102.3 |
| Mozilla | Thunderbird | unspecified – < 102.3 | 102.3 |
| Mozilla | Firefox | unspecified – < 105 | 105 |
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 | 102.3.0esr-1 | — |
| Debian 14 | thunderbird | 1:102.3.0-1 | — |
| Debian 13 | firefox-esr | 102.3.0esr-1 | — |
| Debian 13 | thunderbird | 1:102.3.0-1 | — |
| Debian 12 | firefox-esr | 102.3.0esr-1 | — |
| Debian 12 | thunderbird | 1:102.3.0-1 | — |
| Debian 11 | firefox-esr | 102.3.0esr-1~deb11u1 | DSA-5237-1 |
| Debian 11 | thunderbird | 1:102.3.0-1~deb11u1 | DSA-5238-1 |
| Debian 10 | firefox-esr | 102.3.0esr-1~deb10u2 | DLA-3121-1 |
| Debian 10 | thunderbird | 1:102.3.0-1~deb10u1 | DLA-3123-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.22.04.1 | USN-5724-1 |
| Ubuntu 20.04 LTS | firefox | 105.0+build2-0ubuntu0.20.04.1 | USN-5649-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.20.04.1 | USN-5724-1 |
| Ubuntu 18.04 LTS | firefox | 105.0+build2-0ubuntu0.18.04.1 | USN-5649-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:102.4.2+build2-0ubuntu0.18.04.1 | USN-5724-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox | 102.3.0-6.el9_0 | RHSA-2022:6700 |
| RHEL 9 | thunderbird | 102.3.0-3.el9_0 | RHSA-2022:6717 |
| RHEL 8 | firefox | 102.3.0-6.el8_6 | RHSA-2022:6702 |
| RHEL 8 | thunderbird | 102.3.0-3.el8_6 | RHSA-2022:6708 |
| RHEL 7 | firefox | 102.3.0-6.el7_9 | RHSA-2022:6711 |
| RHEL 7 | thunderbird | 102.3.0-3.el7_9 | RHSA-2022:6710 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | firefox | 102.3.0-6.el8_4 | RHSA-2022:6701 |
| RHEL 8.4 EUS | thunderbird | 102.3.0-3.el8_4 | RHSA-2022:6713 |
| RHEL 8.2 EUS | firefox | 102.3.0-6.el8_2 | RHSA-2022:6707 |
| RHEL 8.2 EUS | thunderbird | 102.3.0-3.el8_2 | RHSA-2022:6715 |
| RHEL 8.1 E4S | firefox | 102.3.0-6.el8_1 | RHSA-2022:6703 |
| RHEL 8.1 E4S | thunderbird | 102.3.0-3.el8_1 | RHSA-2022:6716 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaThunderbird | 102.4.0-150200.8.85.1 | SUSE-SU-2022:3800-1 |
| SLES 15 SP3 | MozillaThunderbird | 102.4.0-150200.8.85.1 | SUSE-SU-2022:3800-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | MozillaThunderbird | 102.4.0-150200.8.85.1 | SUSE-SU-2022:3800-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 102.4.0-150200.8.85.1 | SUSE-SU-2022:3800-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | firefox-esr | 102.3.0-r0 | — |
| Alpine v3.22 | firefox-esr | 102.3.0-r0 | — |
| Alpine v3.21 | firefox-esr | 102.3.0-r0 | — |
| Alpine v3.20 | firefox-esr | 102.3.0-r0 | — |
| Alpine v3.19 | firefox-esr | 102.3.0-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | firefox-esr | 102.3.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 102.7.1-1.amzn2.0.1 | ALAS2-2023-1951 |
Advisories 22
- RHSA-2022:6711 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2022:6710 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5724-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5649-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5238-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5237-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3123-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3121-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2022:6717 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6715 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6716 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6713 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6707 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6708 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6703 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6701 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6702 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:6700 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- SUSE-SU-2022:3800-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2023-1951 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 30, 2025
- WID-SEC-2022-1484 Mozilla Firefox und Mozilla Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
- WID-SEC-2022-1497 Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 22, 2023