Description
Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 115.33 |
| Mozilla | Thunderbird | — | 140.8 |
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 | 140.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:140.8.0esr-1 | — |
| Debian 13 | firefox-esr | 140.8.0esr-1~deb13u1 | DSA-6148-1 |
| Debian 13 | thunderbird | 1:140.8.0esr-1~deb13u1 | DSA-6152-1 |
| Debian 12 | firefox-esr | 140.8.0esr-1~deb12u1 | DSA-6148-1 |
| Debian 12 | thunderbird | 1:140.8.0esr-1~deb12u1 | DSA-6152-1 |
| Debian 11 | firefox-esr | 140.8.0esr-1~deb11u1 | DLA-4496-1 |
| Debian 11 | thunderbird | 1:140.8.0esr-1~deb11u1 | DLA-4495-1 |
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 | 140.8.0-2.el10_1 | RHSA-2026:3517, RHSA-2026:3361 |
| RHEL 9 | firefox +1 | 140.8.0-2.el9_7 | RHSA-2026:3339 |
| RHEL 9 | thunderbird | 140.8.0-1.el9_7 | RHSA-2026:3516 |
| RHEL 8 | firefox | 140.8.0-2.el8_10 | RHSA-2026:3338 |
| RHEL 8 | thunderbird | 140.8.0-1.el8_10 | RHSA-2026:3515 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox +1 | 140.8.0-2.el10_0 | RHSA-2026:4260, RHSA-2026:3976 |
| RHEL 9.6 EUS | firefox +1 | 140.8.0-2.el9_6 | RHSA-2026:3497 |
| RHEL 9.6 EUS | thunderbird | 140.8.0-1.el9_6 | RHSA-2026:3982 |
| RHEL 9.4 EUS | firefox +1 | 140.8.0-2.el9_4 | RHSA-2026:3496 |
| RHEL 9.4 EUS | thunderbird | 140.8.0-1.el9_4 | RHSA-2026:3981 |
| RHEL 9.2 E4S | firefox +1 | 140.8.0-2.el9_2 | RHSA-2026:4152 |
| RHEL 9.2 E4S | thunderbird | 140.8.0-1.el9_2 | RHSA-2026:3978 |
| RHEL 9.0 E4S | firefox | 140.8.0-2.el9_0 | RHSA-2026:3493 |
| RHEL 9.0 E4S | thunderbird | 140.8.0-1.el9_0 | RHSA-2026:3983 |
| RHEL 8.8 TUS | firefox | 140.8.0-2.el8_8 | RHSA-2026:3494 |
| RHEL 8.8 TUS | thunderbird | 140.8.0-1.el8_8 | RHSA-2026:4022 |
| RHEL 8.8 E4S | firefox | 140.8.0-2.el8_8 | RHSA-2026:3494 |
| RHEL 8.8 E4S | thunderbird | 140.8.0-1.el8_8 | RHSA-2026:4022 |
| RHEL 8.6 TUS | firefox | 140.8.0-2.el8_6 | RHSA-2026:3495 |
| RHEL 8.6 TUS | thunderbird | 140.8.0-1.el8_6 | RHSA-2026:3979 |
| RHEL 8.6 E4S | firefox | 140.8.0-2.el8_6 | RHSA-2026:3495 |
| RHEL 8.6 E4S | thunderbird | 140.8.0-1.el8_6 | RHSA-2026:3979 |
| RHEL 8.6 AUS | firefox | 140.8.0-2.el8_6 | RHSA-2026:3495 |
| RHEL 8.6 AUS | thunderbird | 140.8.0-1.el8_6 | RHSA-2026:3979 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.8.0-2.el8_4 | RHSA-2026:3980, RHSA-2026:3491 |
| RHEL 8.4 AUS | firefox +1 | 140.8.0-2.el8_4 | RHSA-2026:3980, RHSA-2026:3491 |
| RHEL 8.2 AUS | firefox | 140.8.0-2.el8_2 | RHSA-2026:3492 |
| RHEL 8.2 AUS | thunderbird | 140.8.0-1.el8_2 | RHSA-2026:4432 |
| RHEL 7 ELS | firefox | 140.8.0-2.el7_9 | RHSA-2026:3984 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 140.8.0-2.el10_1 | ALSA-2026:3361 |
| AlmaLinux 10 | thunderbird | 140.8.0-2.el10_1.alma.1 | ALSA-2026:3517 |
| AlmaLinux 9 | firefox +1 | 140.8.0-2.el9_7.alma.1 | ALSA-2026:3339 |
| AlmaLinux 9 | thunderbird | 140.8.0-1.el9_7.alma.1 | ALSA-2026:3516 |
| AlmaLinux 8 | firefox | 140.8.0-2.el8_10.alma.1 | ALSA-2026:3338 |
| AlmaLinux 8 | thunderbird | 140.8.0-1.el8_10.alma.1 | ALSA-2026:3515 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox +1 | 140.8.0-2.el10_1 | RLSA-2026:3517, RLSA-2026:3361 |
| Rocky Linux 9 | firefox | 140.8.0-2.el9_7 | RLSA-2026:3339 |
| Rocky Linux 9 | thunderbird | 140.8.0-1.el9_7 | RLSA-2026:3516 |
| Rocky Linux 8 | firefox | 140.8.0-2.el8_10 | RLSA-2026:3338 |
| Rocky Linux 8 | thunderbird | 140.8.0-1.el8_10 | RLSA-2026:3515 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.8.0-150200.8.260.1 | SUSE-SU-2026:0880-1 |
| SLES 15 SP6 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES 15 SP5 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES 15 SP4 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES 12 SP5 | MozillaFirefox | 140.8.0-112.301.1 | SUSE-SU-2026:0812-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 148.0-1.1 | openSUSE-SU-2026:10257-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 140.8.0-1.1 | openSUSE-SU-2026:10248-1, openSUSE-SU-2026:10242-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 140.8.0-160000.1.1 | openSUSE-SU-2026:20365-1 |
| openSUSE Leap 16.0 | MozillaThunderbird | 140.8.1-bp160.1.1 | openSUSE-SU-2026:20391-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.8.0-150200.152.222.1 | SUSE-SU-2026:0871-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.8.0-150200.8.260.1 | SUSE-SU-2026:0880-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.8.0-1.amzn2023.0.1 | ALAS2023-2026-1470 |
| Amazon Linux 2 | thunderbird | 140.8.0-1.amzn2.0.1 | ALAS2-2026-3198 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox +1 | 140.8.0-2.0.1.el10_1 | ELSA-2026-3517, ELSA-2026-3361 |
| Oracle Linux 9 | firefox +1 | 140.8.0-2.0.1.el9_7 | ELSA-2026-3339 |
| Oracle Linux 9 | thunderbird | 140.8.0-1.0.1.el9_7 | ELSA-2026-3516 |
| Oracle Linux 8 | firefox | 140.8.0-2.0.1.el8_10 | ELSA-2026-3338 |
| Oracle Linux 8 | thunderbird | 140.8.0-1.0.1.el8_10 | ELSA-2026-3515 |
| Oracle Linux 7 | firefox | 140.8.0-2.0.1.el7_9 | ELSA-2026-3984 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.8.0-r0 | — |
Advisories 50
- WID-SEC-2026-0497 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:3361 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3517 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3516 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3339 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3515 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3338 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:4432 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:4260 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:4152 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:4022 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3984 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3983 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3982 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3981 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3980 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3978 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3979 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3976 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3517 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3516 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3515 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3497 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3495 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3496 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3493 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3494 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3491 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3492 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3361 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3339 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2026:3338 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- ELSA-2026-3984 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 10, 2026
- ALAS2023-2026-1470 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 27, 2026
- openSUSE-SU-2026:20391-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 26, 2026
- openSUSE-SU-2026:20365-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10257-1 MozillaFirefox-148.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10242-1 firefox-esr-140.8.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2-2026-3198 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 19, 2026
- SUSE-SU-2026:0880-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 13, 2026
- SUSE-SU-2026:0871-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 13, 2026
- DSA-6148-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2026:3515 Important: thunderbird security update Rocky Linux Security Advisories · Mar 9, 2026
- RLSA-2026:3517 Important: thunderbird security update Rocky Linux Security Advisories · Mar 9, 2026
- RLSA-2026:3516 Important: thunderbird security update Rocky Linux Security Advisories · Mar 9, 2026
- SUSE-SU-2026:0812-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 5, 2026
- DLA-4496-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 2, 2026
- ELSA-2026-3516 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 2, 2026
- ELSA-2026-3515 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 2, 2026
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2014550
- https://www.mozilla.org/security/advisories/mfsa2026-13/
- https://www.mozilla.org/security/advisories/mfsa2026-14/
- https://www.mozilla.org/security/advisories/mfsa2026-15/
- https://www.mozilla.org/security/advisories/mfsa2026-16/
- https://www.mozilla.org/security/advisories/mfsa2026-17/