Description
Memory safety bugs present in Firefox 122, Firefox ESR 115.7, and Thunderbird 115.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 123 | 123 |
| Mozilla | Firefox ESR | unspecified – < 115.8 | 115.8 |
| Mozilla | Thunderbird | unspecified – < 115.8 | 115.8 |
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 | 115.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.8.0-1 | — |
| Debian 13 | firefox-esr | 115.8.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.8.0-1 | — |
| Debian 12 | firefox-esr | 115.8.0esr-1~deb12u1 | DSA-5627-1 |
| Debian 12 | thunderbird | 1:115.8.0-1~deb12u1 | DSA-5630-1 |
| Debian 11 | firefox-esr | 115.8.0esr-1~deb11u1 | DSA-5627-1 |
| Debian 11 | thunderbird | 1:115.8.0-1~deb11u1 | DSA-5630-1 |
| Debian 10 | firefox-esr | 115.8.0esr-1~deb10u1 | DLA-3747-1 |
| Debian 10 | thunderbird | 1:115.8.0-1~deb10u1 | DLA-3748-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:115.8.1+build1-0ubuntu0.22.04.1 | USN-6669-1 |
| Ubuntu 20.04 LTS | firefox | 123.0+build3-0ubuntu0.20.04.1 | USN-6649-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.8.1+build1-0ubuntu0.20.04.1 | USN-6669-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 115.8.0-1.el9_3 | RHSA-2024:0963, RHSA-2024:0952 |
| RHEL 8 | firefox +1 | 115.8.0-1.el8_9 | RHSA-2024:0964, RHSA-2024:0955 |
| RHEL 7 | firefox +1 | 115.8.0-1.el7_9 | RHSA-2024:0976, RHSA-2024:0957 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 115.8.0-1.el9_2 | RHSA-2024:0984, RHSA-2024:0983 |
| RHEL 9.0 EUS | firefox +1 | 115.8.0-1.el9_0 | RHSA-2024:0968, RHSA-2024:0962 |
| RHEL 8.8 EUS | firefox +1 | 115.8.0-1.el8_8 | RHSA-2024:0969, RHSA-2024:0961 |
| RHEL 8.6 EUS | firefox +1 | 115.8.0-1.el8_6 | RHSA-2024:0970, RHSA-2024:0960 |
| RHEL 8.4 TUS | firefox +1 | 115.8.0-1.el8_4 | RHSA-2024:0971, RHSA-2024:0959 |
| RHEL 8.4 E4S | firefox +1 | 115.8.0-1.el8_4 | RHSA-2024:0971, RHSA-2024:0959 |
| RHEL 8.4 AUS | firefox +1 | 115.8.0-1.el8_4 | RHSA-2024:0971, RHSA-2024:0959 |
| RHEL 8.2 TUS | firefox +1 | 115.8.0-1.el8_2 | RHSA-2024:0972, RHSA-2024:0958 |
| RHEL 8.2 E4S | firefox +1 | 115.8.0-1.el8_2 | RHSA-2024:0972, RHSA-2024:0958 |
| RHEL 8.2 AUS | firefox +1 | 115.8.0-1.el8_2 | RHSA-2024:0972, RHSA-2024:0958 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 115.8.0-1.el9_3.alma | ALSA-2024:0963, ALSA-2024:0952 |
| AlmaLinux 8 | firefox +1 | 115.8.0-1.el8_9.alma | ALSA-2024:0964, ALSA-2024:0955 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox | 115.8.0-1.el8_9 | RLSA-2024:0955 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.8.0-150200.8.148.1 | SUSE-SU-2024:0608-1 |
| SLES 15 SP4 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES 15 SP3 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES 15 SP2 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES 12 SP5 | MozillaFirefox | 115.8.0-112.200.1 | SUSE-SU-2024:0580-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.8.0-112.200.1 | SUSE-SU-2024:0580-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 123.0-1.1 | openSUSE-SU-2024:13728-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.8.0-1.1 | openSUSE-SU-2024:13711-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.8.0-150200.152.126.3 | SUSE-SU-2024:1002-1, SUSE-SU-2024:0607-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.8.0-150200.8.148.1 | SUSE-SU-2024:0608-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | mozjs | 115.8.0-r0 | — |
| Alpine v3.23 | mozjs | 115.8.0-r0 | — |
| Alpine v3.22 | mozjs | 115.8.0-r0 | — |
| Alpine v3.21 | mozjs | 115.8.0-r0 | — |
| Alpine v3.20 | mozjs115 | 115.8.0-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | mozjs115 +1 | 115.8.0-r0 | — |
| Alpine v3.18 | firefox-esr | 115.8.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.8.0-1.amzn2.0.1 | ALAS2-2024-2477 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 115.8.0-1.0.1.el9_3 | ELSA-2024-0963, ELSA-2024-0952 |
| Oracle Linux 8 | firefox +1 | 115.8.0-1.0.1.el8_9 | ELSA-2024-0964, ELSA-2024-0955 |
| Oracle Linux 7 | firefox +1 | 115.8.0-1.0.1.el7_9 | ELSA-2024-0976, ELSA-2024-0957 |
Advisories 45
- ALSA-2024:0952 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0963 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0955 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0964 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:0976 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:0957 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6669-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6649-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RHSA-2024:0959 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0964 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0971 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0972 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0983 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0952 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0963 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0984 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0955 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0968 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0958 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0969 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0970 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0960 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0961 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0962 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- DSA-5630-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5627-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3747-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3748-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:0955 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:13711-1 MozillaThunderbird-115.8.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0608-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0607-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:1002-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13728-1 MozillaFirefox-123.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2024:0580-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2024-0443 Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 15, 2024
- WID-SEC-2024-1248 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 21, 2024
- ALAS2-2024-2477 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 4, 2024
- ELSA-2024-0963 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 27, 2024
- ELSA-2024-0964 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 27, 2024
- ELSA-2024-0955 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 26, 2024
- ELSA-2024-0957 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 26, 2024
- ELSA-2024-0976 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 26, 2024
- ELSA-2024-0952 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 23, 2024
References
- Memory safety bugs fixed in Firefox 123, Firefox ESR 115.8, and Thunderbird 115.8
- https://www.mozilla.org/security/advisories/mfsa2024-05/
- https://www.mozilla.org/security/advisories/mfsa2024-06/
- https://www.mozilla.org/security/advisories/mfsa2024-07/
- https://lists.debian.org/debian-lts-announce/2024/03/msg00000.html
- https://lists.debian.org/debian-lts-announce/2024/03/msg00001.html