Description
Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. 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 < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 122 | 122 |
| Mozilla | Firefox ESR | unspecified – < 115.7 | 115.7 |
| Mozilla | Thunderbird | unspecified – < 115.7 | 115.7 |
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 | 115.7.0esr-1 | — |
| Debian 14 | thunderbird | 1:115.7.0-1 | — |
| Debian 13 | firefox-esr | 115.7.0esr-1 | — |
| Debian 13 | thunderbird | 1:115.7.0-1 | — |
| Debian 12 | firefox-esr | 115.7.0esr-1~deb12u1 | DSA-5606-1 |
| Debian 12 | thunderbird | 1:115.7.0-1~deb12u1 | DSA-5605-1 |
| Debian 11 | firefox-esr | 115.7.0esr-1~deb11u1 | DSA-5606-1 |
| Debian 11 | thunderbird | 1:115.7.0-1~deb11u1 | DSA-5605-1 |
| Debian 10 | firefox-esr | 115.7.0esr-1~deb10u1 | DLA-3727-1 |
| Debian 10 | thunderbird | 1:115.7.0-1~deb10u1 | DLA-3720-1 |
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 | 122.0+build2-0ubuntu0.20.04.1 | USN-6610-1 |
| 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 | 115.7.0-1.el9_3 | RHSA-2024:0603, RHSA-2024:0602 |
| RHEL 8 | firefox +1 | 115.7.0-1.el8_9 | RHSA-2024:0609, RHSA-2024:0608 |
| RHEL 7 | firefox +1 | 115.7.0-1.el7_9 | RHSA-2024:0601, RHSA-2024:0600 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 115.7.0-1.el9_2 | RHSA-2024:0605, RHSA-2024:0604 |
| RHEL 9.0 EUS | firefox +1 | 115.7.0-1.el9_0 | RHSA-2024:0616, RHSA-2024:0615 |
| RHEL 8.8 EUS | firefox +1 | 115.7.0-1.el8_8 | RHSA-2024:0598, RHSA-2024:0596 |
| RHEL 8.6 EUS | firefox +1 | 115.7.0-1.el8_6 | RHSA-2024:0623, RHSA-2024:0622 |
| RHEL 8.4 TUS | firefox +1 | 115.7.0-1.el8_4 | RHSA-2024:0565, RHSA-2024:0559 |
| RHEL 8.4 E4S | firefox +1 | 115.7.0-1.el8_4 | RHSA-2024:0565, RHSA-2024:0559 |
| RHEL 8.4 AUS | firefox +1 | 115.7.0-1.el8_4 | RHSA-2024:0565, RHSA-2024:0559 |
| RHEL 8.2 TUS | firefox +1 | 115.7.0-1.el8_2 | RHSA-2024:0619, RHSA-2024:0618 |
| RHEL 8.2 E4S | firefox +1 | 115.7.0-1.el8_2 | RHSA-2024:0619, RHSA-2024:0618 |
| RHEL 8.2 AUS | firefox +1 | 115.7.0-1.el8_2 | RHSA-2024:0619, RHSA-2024:0618 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 115.7.0-1.el9_3.alma | ALSA-2024:0603, ALSA-2024:0602 |
| AlmaLinux 8 | firefox +1 | 115.7.0-1.el8_9.alma.1 | ALSA-2024:0609, ALSA-2024:0608 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 115.7.0-1.el8_9 | RLSA-2024:0609, RLSA-2024:0608 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES 15 SP5 | MozillaThunderbird | 115.7.0-150200.8.145.1 | SUSE-SU-2024:0242-1 |
| SLES 15 SP4 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES 15 SP3 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES 15 SP2 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES 15 SP1 | MozillaFirefox | 115.7.0-150000.150.122.1 | SUSE-SU-2024:0228-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 115.7.0-112.197.1 | SUSE-SU-2024:0211-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 115.7.0-150000.150.122.1 | SUSE-SU-2024:0228-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 115.7.0-112.197.1 | SUSE-SU-2024:0211-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 115.7.0-150000.150.122.1 | SUSE-SU-2024:0228-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 122.0-1.1 | openSUSE-SU-2024:13626-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 115.7.0-1.1 | openSUSE-SU-2024:13617-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 115.7.0-150200.152.123.1 | SUSE-SU-2024:0229-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 115.7.0-150200.8.145.1 | SUSE-SU-2024:0242-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | firefox-esr | 115.7.0-r0 | — |
| Alpine v3.18 | firefox-esr | 115.7.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 115.7.0-1.amzn2.0.2 | ALAS2-2024-2440 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 115.7.0-1.0.1.el9_3 | ELSA-2024-0603, ELSA-2024-0602 |
| Oracle Linux 8 | firefox +1 | 115.7.0-1.0.1.el8_9 | ELSA-2024-0609, ELSA-2024-0608 |
| Oracle Linux 7 | firefox +1 | 115.7.0-1.0.1.el7_9 | ELSA-2024-0601, ELSA-2024-0600 |
Advisories 46
- ALSA-2024:0602 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0603 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0609 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:0608 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:0601 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:0600 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-6669-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-6610-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- RHSA-2024:0618 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0622 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0623 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0605 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0608 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0609 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0616 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0619 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0604 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0596 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0615 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0602 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0603 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0598 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0559 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- RHSA-2024:0565 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- DSA-5605-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5606-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3727-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3720-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:0608 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2024:0609 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:13617-1 MozillaThunderbird-115.7.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0211-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0228-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13626-1 MozillaFirefox-122.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0229-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:0242-1 Security update for MozillaThunderbird 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
- WID-SEC-2024-0185 Mozilla Firefox: 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
- ALAS2-2024-2440 Moderate: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 1, 2024
- ELSA-2024-0602 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 31, 2024
- ELSA-2024-0608 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 31, 2024
- ELSA-2024-0609 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jan 31, 2024
- ELSA-2024-0603 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jan 30, 2024
- ELSA-2024-0601 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 30, 2024
- ELSA-2024-0600 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 30, 2024
References
- Memory safety bugs fixed in Firefox 122, Firefox ESR 115.7, and Thunderbird 115.7
- https://www.mozilla.org/security/advisories/mfsa2024-01/
- https://www.mozilla.org/security/advisories/mfsa2024-02/
- https://www.mozilla.org/security/advisories/mfsa2024-04/
- https://lists.debian.org/debian-lts-announce/2024/01/msg00015.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00022.html