Description
Memory safety bugs were reported in Firefox 59, Firefox ESR 52.7, and Thunderbird 52.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 52.8 | 52.8 |
| Mozilla | Thunderbird ESR | unspecified – < 52.8 | 52.8 |
| Mozilla | Firefox | unspecified – < 60 | 60 |
| Mozilla | Firefox ESR | unspecified – < 52.8 | 52.8 |
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 | 52.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:52.8.0-1 | — |
| Debian 13 | firefox-esr | 52.8.0esr-1 | — |
| Debian 13 | thunderbird | 1:52.8.0-1 | — |
| Debian 12 | firefox-esr | 52.8.0esr-1 | — |
| Debian 12 | thunderbird | 1:52.8.0-1 | — |
| Debian 9 | firefox-esr | 52.8.0esr-1~deb9u1 | DSA-4199-1 |
| Debian 9 | thunderbird | 1:52.8.0-1~deb9u1 | DSA-4209-1 |
| Debian 8 | firefox-esr | 52.8.0esr-1~deb8u1 | DSA-4199-1 |
| Debian 8 | thunderbird | 1:52.8.0-1~deb8u1 | DSA-4209-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | firefox-esr | 52.8.0esr-1~deb7u1 | DLA-1376-1 |
| Debian 7 | thunderbird | 1:52.8.0-1~deb7u1 | DLA-1382-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | firefox | 60.0+build2-0ubuntu1 | USN-3645-1 |
| Ubuntu 18.04 LTS | mozjs38 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs52 | 52.8.1-0ubuntu0.18.04.1 | USN-3688-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.18.04.1 | USN-3660-1 |
| Ubuntu 16.04 LTS | firefox | 60.0+build2-0ubuntu0.16.04.1 | USN-3645-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.16.04.1 | USN-3660-1 |
| Ubuntu 14.04 LTS | firefox | 60.0+build2-0ubuntu0.14.04.1 | USN-3645-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.14.04.1 | USN-3660-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +1 | 52.8.0-1.el7_5 | RHSA-2018:1725, RHSA-2018:1415 |
| RHEL 6 | firefox | 52.8.0-1.el6_9 | RHSA-2018:1414 |
| RHEL 6 | thunderbird | 52.8.0-2.el6_9 | RHSA-2018:1726 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | MozillaFirefox | 52.9.0esr-3.7.12 | SUSE-SU-2018:2298-1 |
| SLES 12 SP5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES 12 SP4 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES 12 SP3 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES 12 SP2 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-2, SUSE-SU-2018:1334-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES 12 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2018:1334-1 |
| SLES 11 SP4 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SLES 11 SP3 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2018:1334-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 52.8.0-1.amzn2 | ALAS2-2018-1032 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox +1 | 52.8.0-1.0.1.el7_5 | ELSA-2018-1725, ELSA-2018-1415 |
Advisories 22
- RHSA-2018:1726 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1725 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1415 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1414 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-3688-1 mozjs52 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3660-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3645-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4199-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4209-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1376-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1382-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:2872-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2298-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1319-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1334-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1334-2 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-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2018-1032 Critical: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 11, 2018
- ELSA-2018-1725 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 24, 2018
- ELSA-2018-1415 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 14, 2018
References
- RHSA-2018:1415 vendor-advisory
- GLSA-201810-01 vendor-advisory
- RHSA-2018:1726 vendor-advisory
- RHSA-2018:1414 vendor-advisory
- GLSA-201811-13 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-13/
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- USN-3660-1 vendor-advisory
- 1040896 vdb-entry
- DSA-4199 vendor-advisory
- USN-3645-1 vendor-advisory
- [debian-lts-announce] 20180525 [SECURITY] [DLA 1382-1] thunderbird security update mailing-list
- [debian-lts-announce] 20180511 [SECURITY] [DLA 1376-1] firefox-esr security update mailing-list
- RHSA-2018:1725 vendor-advisory
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1388020%2C1433609%2C1409440%2C1448705%2C1451376%2C1452202%2C1444668%2C1393367%2C1411415%2C1426129
- USN-3688-1 vendor-advisory
- DSA-4209 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- 104136 vdb-entry