Description
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 128.14 |
| Mozilla | Thunderbird | — | 128.14 |
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 | 128.14.0esr-1 | — |
| Debian 14 | thunderbird | 1:128.14.0esr-1 | — |
| Debian 13 | firefox-esr | 128.14.0esr-1~deb13u1 | DSA-5980-1 |
| Debian 13 | thunderbird | 1:128.14.0esr-1~deb13u1 | DSA-5984-1 |
| Debian 12 | firefox-esr | 128.14.0esr-1~deb12u1 | DSA-5980-1 |
| Debian 12 | thunderbird | 1:128.14.0esr-1~deb12u1 | DSA-5984-1 |
| Debian 11 | firefox-esr | 128.14.0esr-1~deb11u1 | DLA-4277-1 |
| Debian 11 | thunderbird | 1:128.14.0esr-1~deb11u1 | DLA-4279-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | — |
| 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 | 128.14.0-2.el10_0 | RHSA-2025:14417 |
| RHEL 10 | thunderbird | 128.14.0-3.el10_0 | RHSA-2025:14844 |
| RHEL 9 | firefox +1 | 128.14.0-2.el9_6 | RHSA-2025:14416 |
| RHEL 9 | thunderbird | 128.14.0-3.el9_6 | RHSA-2025:14640 |
| RHEL 8 | firefox | 128.14.0-2.el8_10 | RHSA-2025:14442 |
| RHEL 8 | thunderbird | 128.14.0-3.el8_10 | RHSA-2025:14743 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | firefox +1 | 128.14.0-2.el9_4 | RHSA-2025:15423 |
| RHEL 9.4 EUS | thunderbird | 128.14.0-3.el9_4 | RHSA-2025:15434 |
| RHEL 9.2 E4S | firefox +1 | 128.14.0-2.el9_2 | RHSA-2025:15421 |
| RHEL 9.2 E4S | thunderbird | 128.14.0-3.el9_2 | RHSA-2025:15435 |
| RHEL 9.0 E4S | firefox | 128.14.0-2.el9_0 | RHSA-2025:15420 |
| RHEL 9.0 E4S | thunderbird | 128.14.0-3.el9_0 | RHSA-2025:15436 |
| RHEL 8.8 TUS | firefox | 128.14.0-2.el8_8 | RHSA-2025:15424 |
| RHEL 8.8 TUS | thunderbird | 128.14.0-3.el8_8 | RHSA-2025:15438 |
| RHEL 8.8 E4S | firefox | 128.14.0-2.el8_8 | RHSA-2025:15424 |
| RHEL 8.8 E4S | thunderbird | 128.14.0-3.el8_8 | RHSA-2025:15438 |
| RHEL 8.6 TUS | firefox | 128.14.0-2.el8_6 | RHSA-2025:15422 |
| RHEL 8.6 TUS | thunderbird | 128.14.0-3.el8_6 | RHSA-2025:15535 |
| RHEL 8.6 E4S | firefox | 128.14.0-2.el8_6 | RHSA-2025:15422 |
| RHEL 8.6 E4S | thunderbird | 128.14.0-3.el8_6 | RHSA-2025:15535 |
| RHEL 8.6 AUS | firefox | 128.14.0-2.el8_6 | RHSA-2025:15422 |
| RHEL 8.6 AUS | thunderbird | 128.14.0-3.el8_6 | RHSA-2025:15535 |
| RHEL 8.4 EUS Long Life | firefox | 128.14.0-2.el8_4 | RHSA-2025:15419 |
| RHEL 8.4 EUS Long Life | thunderbird | 128.14.0-3.el8_4 | RHSA-2025:15496 |
| RHEL 8.4 AUS | firefox | 128.14.0-2.el8_4 | RHSA-2025:15419 |
| RHEL 8.4 AUS | thunderbird | 128.14.0-3.el8_4 | RHSA-2025:15496 |
| RHEL 8.2 AUS | firefox | 128.14.0-2.el8_2 | RHSA-2025:15418 |
| RHEL 8.2 AUS | thunderbird | 128.14.0-3.el8_2 | RHSA-2025:15437 |
| RHEL 7 ELS | firefox | 128.14.0-2.el7_9 | RHSA-2025:15430 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 128.14.0-2.el10_0 | ALSA-2025:14417 |
| AlmaLinux 10 | thunderbird | 128.14.0-3.el10_0.alma.1 | ALSA-2025:14844 |
| AlmaLinux 9 | firefox +1 | 128.14.0-2.el9_6.alma.1 | ALSA-2025:14416 |
| AlmaLinux 9 | thunderbird | 128.14.0-3.el9_6.alma.1 | ALSA-2025:14640 |
| AlmaLinux 8 | firefox | 128.14.0-2.el8_10.alma.1 | ALSA-2025:14442 |
| AlmaLinux 8 | thunderbird | 128.14.0-3.el8_10.alma.1 | ALSA-2025:14743 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox | 128.14.0-2.el10_0 | RLSA-2025:14417 |
| Rocky Linux 10 | thunderbird | 128.14.0-3.el10_0 | RLSA-2025:14844 |
| Rocky Linux 9 | firefox | 128.14.0-2.el9_6 | RLSA-2025:14416 |
| Rocky Linux 8 | firefox | 128.14.0-2.el8_10 | RLSA-2025:14442 |
| Rocky Linux 8 | thunderbird | 128.14.0-3.el8_10 | RLSA-2025:14743 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.2.0-150200.8.236.1 | SUSE-SU-2025:03007-1 |
| SLES 15 SP6 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP6 | MozillaThunderbird | 140.2.0-150200.8.236.1 | SUSE-SU-2025:03007-1 |
| SLES 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 140.2.0-112.276.1 | SUSE-SU-2025:03009-1 |
| SLES for SAP 16.0 | mozjs128 | 128.14.0-160000.1.1 | SUSE-SU-2025:21170-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 16.0 | mozjs128 | 128.14.0-160000.1.1 | SUSE-SU-2025:21170-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 142.0.1-1.1 | openSUSE-SU-2025:15516-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 140.2.0-1.1 | openSUSE-SU-2025:15472-1, openSUSE-SU-2025:15467-1 |
| openSUSE Tumbleweed | mozjs128 | 128.14.0-1.1 | openSUSE-SU-2025:15494-1 |
| openSUSE Leap 16.0 | mozjs128 | 128.14.0-160000.1.1 | openSUSE-SU-2025:20135-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.2.0-150200.8.236.1 | SUSE-SU-2025:03007-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.2.0-1.amzn2023.0.1 | ALAS2023-2025-1171 |
| Amazon Linux 2 | thunderbird | 140.2.0-1.amzn2.0.1 | ALAS2-2025-2999 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox | 128.14.0-2.0.1.el10_0 | ELSA-2025-14417 |
| Oracle Linux 10 | thunderbird | 128.14.0-3.0.1.el10_0 | ELSA-2025-14844 |
| Oracle Linux 9 | firefox +1 | 128.14.0-2.0.1.el9_6 | ELSA-2025-14416 |
| Oracle Linux 9 | thunderbird | 128.14.0-3.0.1.el9_6 | ELSA-2025-14640 |
| Oracle Linux 8 | firefox | 128.14.0-2.0.1.el8_10 | ELSA-2025-14442 |
| Oracle Linux 8 | thunderbird | 128.14.0-3.0.1.el8_10 | ELSA-2025-14743 |
| Oracle Linux 7 | firefox | 128.14.0-2.0.1.el7_9 | ELSA-2025-15430 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 128.14-r0 | — |
Advisories 50
- ALSA-2025:14417 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:14844 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:14416 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:14640 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:14442 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:14743 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:15535 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15496 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15438 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15436 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15437 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15434 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15435 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15430 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15423 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15424 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15421 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15422 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15420 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15418 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:15419 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14844 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14743 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14640 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14442 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14417 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2025:14416 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- WID-SEC-2025-1866 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 15, 2026
- openSUSE-SU-2025:20135-1 Security update for mozjs128 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15516-1 MozillaFirefox-142.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15494-1 libmozjs-128-0-128.14.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15467-1 firefox-esr-140.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15472-1 MozillaThunderbird-140.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21170-1 Security update for mozjs128 SUSE / openSUSE Security Updates · Mar 23, 2026
- DSA-5984-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4277-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4279-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5980-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:03009-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03008-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03007-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2025:14416 Important: firefox security update Rocky Linux Security Advisories · Oct 10, 2025
- RLSA-2025:14844 Important: thunderbird security update Rocky Linux Security Advisories · Oct 8, 2025
- RLSA-2025:14417 Important: firefox security update Rocky Linux Security Advisories · Oct 8, 2025
- ELSA-2025-15430 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 22, 2025
- ALAS2-2025-2999 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 16, 2025
- RLSA-2025:14442 Important: firefox security update Rocky Linux Security Advisories · Sep 8, 2025
- RLSA-2025:14743 Important: thunderbird security update Rocky Linux Security Advisories · Sep 8, 2025
- ALAS2023-2025-1171 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 8, 2025
- ELSA-2025-14844 Important: thunderbird security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 28, 2025
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1977130
- https://www.mozilla.org/security/advisories/mfsa2025-64/
- https://www.mozilla.org/security/advisories/mfsa2025-66/
- https://www.mozilla.org/security/advisories/mfsa2025-67/
- https://www.mozilla.org/security/advisories/mfsa2025-70/
- https://www.mozilla.org/security/advisories/mfsa2025-71/
- https://www.mozilla.org/security/advisories/mfsa2025-72/