Description
Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, Thunderbird 140.10.1, and Firefox ESR 115.35.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 115.35.2 |
| Mozilla | Thunderbird | — | 140.10.1 |
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 | 140.10.1esr-1 | — |
| Debian 14 | thunderbird | 1:140.10.1esr-1 | — |
| Debian 13 | firefox-esr | 140.10.1esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:140.10.1esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 140.10.1esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:140.10.1esr-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 | 140.10.1-1.el10_2 | RHSA-2026:19157, RHSA-2026:19153 |
| RHEL 9 | firefox +2 | 140.10.1-1.el9_8 | RHSA-2026:19370, RHSA-2026:19348 |
| RHEL 8 | firefox +1 | 140.10.1-1.el8_10 | RHSA-2026:20586, RHSA-2026:19588 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox +1 | 140.10.1-1.el10_0 | RHSA-2026:24719, RHSA-2026:22408 |
| RHEL 9.6 EUS | firefox +2 | 140.10.1-1.el9_6 | RHSA-2026:24721, RHSA-2026:22409 |
| RHEL 9.4 E4S | firefox +2 | 140.10.1-1.el9_4 | RHSA-2026:24846, RHSA-2026:22324 |
| RHEL 9.2 E4S | firefox +2 | 140.10.1-1.el9_2 | RHSA-2026:24844, RHSA-2026:22410 |
| RHEL 9.0 E4S | firefox | 140.10.1-1.el9_0 | RHSA-2026:21743 |
| RHEL 8.8 TUS | firefox +1 | 140.10.1-1.el8_8 | RHSA-2026:24717, RHSA-2026:22847 |
| RHEL 8.8 E4S | firefox +1 | 140.10.1-1.el8_8 | RHSA-2026:24717, RHSA-2026:22847 |
| RHEL 8.6 EUS Long Life | firefox +1 | 140.10.1-1.el8_6 | RHSA-2026:25014, RHSA-2026:24345 |
| RHEL 8.6 AUS | firefox +1 | 140.10.1-1.el8_6 | RHSA-2026:25014, RHSA-2026:24345 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.10.1-1.el8_4 | RHSA-2026:24718, RHSA-2026:22712 |
| RHEL 8.4 AUS | firefox +1 | 140.10.1-1.el8_4 | RHSA-2026:24718, RHSA-2026:22712 |
| RHEL 7 ELS | firefox | 140.10.1-1.el7_9 | RHSA-2026:22708 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 140.10.1-1.el10_2 | ALSA-2026:19157 |
| AlmaLinux 10 | thunderbird | 140.10.1-1.el10_2.alma.1 | ALSA-2026:19153 |
| AlmaLinux 9 | firefox +2 | 140.10.1-1.el9_8.alma.1 | ALSA-2026:19370, ALSA-2026:19348 |
| AlmaLinux 8 | firefox +1 | 140.10.1-1.el8_10.alma.1 | ALSA-2026:20586, ALSA-2026:19588 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | firefox-esr | 140.10.2-1.1 | openSUSE-SU-2026:10720-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.10.2-1.amzn2023.0.3 | ALAS2023-2026-1725 |
| Amazon Linux 2 | thunderbird | 140.10.2-1.amzn2.0.2 | ALAS2-2026-3315 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.10.1-r0 | — |
Advisories 33
- WID-SEC-2026-1427 Mozilla Firefox und Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:19153 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:19157 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:19370 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:19348 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:19588 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:20586 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- WID-SEC-2026-2455 Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026
- RHSA-2026:22324 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24718 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22409 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24719 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22410 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24846 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:19153 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:19157 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24717 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:25014 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24844 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24721 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:24345 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22847 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22712 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22708 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:22408 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:21743 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:20586 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:19588 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:19370 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- RHSA-2026:19348 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- ALAS2-2026-3315 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 26, 2026
- ALAS2023-2026-1725 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 26, 2026
- openSUSE-SU-2026:10720-1 firefox-esr-140.10.2-1.1 on GA media SUSE / openSUSE Security Updates · May 9, 2026
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029301
- https://www.mozilla.org/security/advisories/mfsa2026-30/
- https://www.mozilla.org/security/advisories/mfsa2026-33/
- https://www.mozilla.org/security/advisories/mfsa2026-36/
- https://www.mozilla.org/security/advisories/mfsa2026-39/
- https://www.mozilla.org/security/advisories/mfsa2026-42/