Description
An error in the ECMA-262 specification relating to Async Generators could have resulted in a type confusion, potentially leading to memory corruption and an exploitable crash. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 128 | 128 |
| Mozilla | Firefox ESR | unspecified – < 115.13 | 115.13 |
| Mozilla | Thunderbird | unspecified – < 115.13, unspecified – < 128 | 115.13 |
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 | 115.13.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.13.0-1 | — |
| Debian 13 | firefox-esr | 115.13.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.13.0-1 | — |
| Debian 12 | firefox-esr | 115.13.0esr-1~deb12u1 | DSA-5727-1 |
| Debian 12 | thunderbird | 1:115.13.0-1~deb12u1 | DSA-5733-1 |
| Debian 11 | firefox-esr | 115.13.0esr-1~deb11u1 | DSA-5727-1 |
| Debian 11 | thunderbird | 1:115.13.0-1~deb11u1 | DSA-5733-1 |
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 | 1:115.13.0+build5-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 128.0+build2-0ubuntu0.20.04.1 | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.13.0+build5-0ubuntu0.20.04.1 | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 128.2.0-1.el9_4 | RHSA-2024:6683, RHSA-2024:6681 |
| RHEL 8 | firefox +1 | 128.2.0-1.el8_10 | RHSA-2024:6684, RHSA-2024:6682 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | thunderbird | 128.2.0-1.el9_2 | RHSA-2024:6720 |
| RHEL 9.0 E4S | thunderbird | 128.2.0-1.el9_0 | RHSA-2024:6722 |
| RHEL 8.8 EUS | thunderbird | 128.2.0-1.el8_8 | RHSA-2024:6719 |
| RHEL 8.6 TUS | firefox +1 | 128.2.0-1.el8_6 | RHSA-2024:6892, RHSA-2024:6816 |
| RHEL 8.6 E4S | firefox | 128.2.0-1.el8_6 | RHSA-2024:6892 |
| RHEL 8.6 AUS | firefox | 128.2.0-1.el8_6 | RHSA-2024:6892 |
| RHEL 8.4 TUS | firefox +1 | 128.2.0-1.el8_4 | RHSA-2024:6891, RHSA-2024:6721 |
| RHEL 8.4 E4S | firefox +1 | 128.2.0-1.el8_4 | RHSA-2024:6891, RHSA-2024:6721 |
| RHEL 8.4 AUS | firefox +1 | 128.2.0-1.el8_4 | RHSA-2024:6891, RHSA-2024:6721 |
| RHEL 8.2 AUS | thunderbird | 128.2.0-1.el8_2 | RHSA-2024:6723 |
| RHEL 7 ELS | firefox | 128.2.0-1.el7_9 | RHSA-2024:6838 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 128.2.0-1.el9_4.alma.1 | ALSA-2024:6683, ALSA-2024:6681 |
| AlmaLinux 8 | firefox +1 | 128.2.0-1.el8_10.alma.1 | ALSA-2024:6684, ALSA-2024:6682 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 128.2.0-1.el9_4.0.1 | RLSA-2024:6683, RLSA-2024:6681 |
| Rocky Linux 8 | firefox +1 | 128.2.0-1.el8_10 | RLSA-2024:6684, RLSA-2024:6682 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.15.0-1.amzn2.0.1 | ALAS2-2024-2638 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 128.2.0-1.0.2.el9_4 | ELSA-2024-6683, ELSA-2024-6681 |
| Oracle Linux 8 | firefox +1 | 128.2.0-1.0.2.el8_10 | ELSA-2024-6684, ELSA-2024-6682 |
| Oracle Linux 7 | firefox | 128.2.0-1.0.1.el7_9 | ELSA-2024-6838 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 128-r0 | — |
Advisories 30
- ALSA-2024:6684 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:6682 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:6681 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:6683 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:6816 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6891 Red Hat Security Advisory: firefox update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6892 Red Hat Security Advisory: firefox update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6838 Red Hat Security Advisory: firefox update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6681 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6723 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6682 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6683 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6720 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6721 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6722 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6684 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:6719 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- DSA-5733-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5727-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:6682 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:6683 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:6681 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:6684 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- WID-SEC-2024-1568 Mozilla Firefox und Firefox ESR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 16, 2025
- ELSA-2024-6838 Important: firefox update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2024
- ALAS2-2024-2638 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2024
- ELSA-2024-6681 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 20, 2024
- ELSA-2024-6683 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 20, 2024
- ELSA-2024-6682 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 20, 2024
- ELSA-2024-6684 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 20, 2024
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1901411
- https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r
- https://www.mozilla.org/security/advisories/mfsa2024-29/
- https://www.mozilla.org/security/advisories/mfsa2024-30/
- https://www.mozilla.org/security/advisories/mfsa2024-31/
- https://www.mozilla.org/security/advisories/mfsa2024-32/