Description
Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.9.1 |
| Mozilla | Thunderbird | — | 140.9.1 |
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 | firefox-esr | 140.9.1esr-1 | — |
| Debian 14 | thunderbird | 1:140.9.1esr-1 | — |
| Debian 13 | firefox-esr | 140.9.1esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:140.9.1esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 140.9.1esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:140.9.1esr-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +3 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | firefox +1 | 140.9.1-1.el10_1 | RHSA-2026:9638, RHSA-2026:7672 |
| RHEL 9 | firefox +2 | 140.9.1-1.el9_7 | RHSA-2026:8459, RHSA-2026:7671 |
| RHEL 8 | firefox +1 | 140.9.1-1.el8_10 | RHSA-2026:9345, RHSA-2026:8052 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox +1 | 140.9.1-1.el10_0 | RHSA-2026:13665, RHSA-2026:11813 |
| RHEL 9.6 EUS | firefox +2 | 140.9.1-1.el9_6 | RHSA-2026:13583, RHSA-2026:13342 |
| RHEL 9.4 EUS | firefox +2 | 140.9.1-1.el9_4 | RHSA-2026:13582, RHSA-2026:13533 |
| RHEL 9.2 E4S | firefox +2 | 140.9.1-1.el9_2 | RHSA-2026:13922, RHSA-2026:13412 |
| RHEL 9.0 E4S | firefox +1 | 140.9.1-1.el9_0 | RHSA-2026:13596, RHSA-2026:12264 |
| RHEL 8.8 TUS | firefox +1 | 140.9.1-1.el8_8 | RHSA-2026:14223, RHSA-2026:13682 |
| RHEL 8.8 E4S | firefox +1 | 140.9.1-1.el8_8 | RHSA-2026:14223, RHSA-2026:13682 |
| RHEL 8.6 TUS | firefox +1 | 140.9.1-1.el8_6 | RHSA-2026:15889, RHSA-2026:13683 |
| RHEL 8.6 E4S | firefox +1 | 140.9.1-1.el8_6 | RHSA-2026:15889, RHSA-2026:13683 |
| RHEL 8.6 AUS | firefox +1 | 140.9.1-1.el8_6 | RHSA-2026:15889, RHSA-2026:13683 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.9.1-1.el8_4 | RHSA-2026:14303, RHSA-2026:13600 |
| RHEL 8.4 AUS | firefox +1 | 140.9.1-1.el8_4 | RHSA-2026:14303, RHSA-2026:13600 |
| RHEL 8.2 AUS | firefox | 140.9.1-1.el8_2 | RHSA-2026:11805 |
| RHEL 7 ELS | firefox | 140.9.1-2.el7_9 | RHSA-2026:13977 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 140.9.1-1.el10_1 | ALSA-2026:7672 |
| AlmaLinux 10 | thunderbird | 140.9.1-1.el10_1.alma.1 | ALSA-2026:9638 |
| AlmaLinux 9 | firefox +2 | 140.9.1-1.el9_7.alma.1 | ALSA-2026:8459, ALSA-2026:7671 |
| AlmaLinux 8 | firefox +1 | 140.9.1-1.el8_10.alma.1 | ALSA-2026:9345, ALSA-2026:8052 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox +1 | 140.9.1-1.el10_1 | RLSA-2026:9638, RLSA-2026:7672 |
| Rocky Linux 9 | firefox +1 | 140.9.1-1.el9_7 | RLSA-2026:8459, RLSA-2026:7671 |
| Rocky Linux 8 | firefox +1 | 140.9.1-1.el8_10 | RLSA-2026:9345, RLSA-2026:8052 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.9.1-150200.8.266.1 | SUSE-SU-2026:1379-1 |
| SLES 15 SP6 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES 15 SP5 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES 15 SP4 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES 12 SP5 | MozillaFirefox | 140.9.1-112.307.1 | SUSE-SU-2026:1273-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | MozillaFirefox | 140.9.1-160000.1.1 | SUSE-SU-2026:21157-1 |
| SLES for SAP 15 SP6 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLES 16.0 | MozillaFirefox | 140.9.1-160000.1.1 | SUSE-SU-2026:21157-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.9.1-150200.152.228.1 | SUSE-SU-2026:1322-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 149.0.2-1.1 | openSUSE-SU-2026:10511-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 140.9.1-1.1 | openSUSE-SU-2026:10503-1, openSUSE-SU-2026:10501-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 140.9.1-160000.1.1 | openSUSE-SU-2026:20486-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.9.1-1.amzn2023.0.1 | ALAS2023-2026-1621 |
| Amazon Linux 2 | thunderbird | 140.9.1-1.amzn2.0.1 | ALAS2-2026-3271 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox +1 | 140.9.1-1.0.1.el10_1 | ELSA-2026-9638, ELSA-2026-7672 |
| Oracle Linux 9 | firefox +2 | 140.9.1-1.0.1.el9_7 | ELSA-2026-8459, ELSA-2026-7671 |
| Oracle Linux 8 | firefox +1 | 140.9.1-1.0.1.el8_10 | ELSA-2026-9345, ELSA-2026-8052 |
| Oracle Linux 7 | firefox | 140.9.1-1.0.1.el7_9 | ELSA-2026-13977 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 151.0.2-r0 | — |
Advisories 50
- WID-SEC-2026-2455 Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2026-0997 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:7672 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:9638 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:8459 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:7671 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:9345 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:8052 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:9638 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:9345 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:8459 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:8052 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:7672 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:7671 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:15889 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:14223 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:14303 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13977 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13922 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13683 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13682 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13665 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13596 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13600 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13582 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13583 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13533 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13412 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:13342 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:12264 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:11813 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2026:11805 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- ELSA-2026-13977 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 11, 2026
- ALAS2023-2026-1621 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 30, 2026
- ALAS2-2026-3271 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 29, 2026
- RLSA-2026:9638 Important: thunderbird security update Rocky Linux Security Advisories · Apr 24, 2026
- RLSA-2026:9345 Important: thunderbird security update Rocky Linux Security Advisories · Apr 23, 2026
- openSUSE-SU-2026:20486-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Apr 22, 2026
- SUSE-SU-2026:21157-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Apr 22, 2026
- ELSA-2026-9638 Important: thunderbird security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 22, 2026
- ELSA-2026-9345 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 21, 2026
- RLSA-2026:8459 Important: thunderbird security update Rocky Linux Security Advisories · Apr 19, 2026
- SUSE-SU-2026:1379-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Apr 17, 2026
- RLSA-2026:8052 Important: firefox security update Rocky Linux Security Advisories · Apr 16, 2026
- ELSA-2026-8459 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 16, 2026
- RLSA-2026:7671 Important: firefox security update Rocky Linux Security Advisories · Apr 15, 2026
- RLSA-2026:7672 Important: firefox security update Rocky Linux Security Advisories · Apr 15, 2026
- SUSE-SU-2026:1322-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Apr 15, 2026
- SUSE-SU-2026:1273-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Apr 14, 2026