Description
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 46.0, Firefox ESR 38.x before 38.8, and Firefox ESR 45.x before 45.1 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
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 | 45.1.0esr-1 | — |
| Debian 13 | firefox-esr | 45.1.0esr-1 | — |
| Debian 12 | firefox-esr | 45.1.0esr-1 | — |
| Debian 8 | icedove | 38.8.0-1~deb8u1 | DSA-3576-1 |
| Debian 8 | iceweasel | 38.8.0esr-1~deb8u1 | DSA-3559-1 |
| Debian 7 | icedove | 38.8.0-1~deb7u1 | DLA-472-1 |
| Debian 7 | iceweasel | 38.8.0esr-1~deb7u1 | DSA-3559-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | firefox | 46.0+build5-0ubuntu0.16.04.2 | USN-2936-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:38.8.0+build1-0ubuntu0.16.04.1 | USN-2973-1 |
| Ubuntu 14.04 LTS | firefox | 46.0+build5-0ubuntu0.14.04.2 | USN-2936-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:38.8.0+build1-0ubuntu0.14.04.1 | USN-2973-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 45.1.0-1.el7_2 | RHSA-2016:0695 |
| RHEL 7 | thunderbird | 38.8.0-1.el7_2 | RHSA-2016:1041 |
| RHEL 6 | firefox | 45.1.0-1.el6_7 | RHSA-2016:0695 |
| RHEL 6 | thunderbird | 38.8.0-2.el6_8 | RHSA-2016:1041 |
| RHEL 5 | firefox | 45.1.0-1.el5_11 | RHSA-2016:0695 |
| RHEL 5 | thunderbird | 38.8.0-1.el5_11 | RHSA-2016:1041 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 38.8.0-1.el5_11 | RHSA-2016:1041 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 38.8.0esr-66.2 | SUSE-SU-2016:1258-1 |
| SLES 12 | MozillaFirefox | 38.8.0esr-66.2 | SUSE-SU-2016:1258-1 |
| SLES 11 SP4 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SLES 11 SP4 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SLES 11 SP4 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
| SLES 11 SP3 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SLES 11 SP3 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SLES 11 SP3 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
| SLES 11 SP2 | MozillaFirefox | 38.8.0esr-40.1 | SUSE-SU-2016:1342-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | MozillaFirefox | 38.8.0esr-66.2 | SUSE-SU-2016:1258-1 |
| SLES for SAP 12 | MozillaFirefox | 38.8.0esr-66.2 | SUSE-SU-2016:1258-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
| SUSE Package Hub 12 | MozillaThunderbird | 45.2-6.1 | openSUSE-SU-2016:1778-1, openSUSE-SU-2016:1769-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SUSE OpenStack Cloud 5 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SUSE OpenStack Cloud 5 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SUSE Manager Proxy 2.1 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SUSE Manager Proxy 2.1 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
| SUSE Manager 2.1 | MozillaFirefox | 38.8.0esr-40.5 | SUSE-SU-2016:1374-1 |
| SUSE Manager 2.1 | mozilla-nspr | 4.12-26.1 | SUSE-SU-2016:1374-1 |
| SUSE Manager 2.1 | mozilla-nss | 3.20.2-30.1 | SUSE-SU-2016:1374-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 45.1.0-1.0.1.el7_2 | ELSA-2016-0695 |
| Oracle Linux 7 | thunderbird | 38.8.0-2.0.1.el6_8 | ELSA-2016-1041 |
Advisories 16
- RHSA-2016:1041 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:0695 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2936-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2973-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-472-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3576-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3559-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1342-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2016:1778-1 Security update for Mozilla Thunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1374-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2016:1769-1 Security update for Mozilla Thunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1258-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2016-1041 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 12, 2016
- ELSA-2016-0695 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 26, 2016
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1252707
- DSA-3576 vendor-advisory
- http://www.mozilla.org/security/announce/2016/mfsa2016-39.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1254622
- openSUSE-SU-2016:1211 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- RHSA-2016:0695 vendor-advisory
- openSUSE-SU-2016:1767 vendor-advisory
- 1035692 vdb-entry
- SUSE-SU-2016:1374 vendor-advisory
- openSUSE-SU-2016:1778 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1254876
- openSUSE-SU-2016:1251 vendor-advisory
- USN-2936-2 vendor-advisory
- SUSE-SU-2016:1352 vendor-advisory
- USN-2973-1 vendor-advisory
- openSUSE-SU-2016:1769 vendor-advisory
- GLSA-201701-15 vendor-advisory
- DSA-3559 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1187420
- USN-2936-1 vendor-advisory
- USN-2936-3 vendor-advisory
- SUSE-SU-2016:1258 vendor-advisory
- RHSA-2016:1041 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1254164