Description
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 and Firefox ESR 38.x before 38.6 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 8 | icedove | 38.6.0-1~deb8u1 | DSA-3491-1 |
| Debian 8 | iceweasel | 38.6.0esr-1~deb8u1 | DSA-3457-1 |
| Debian 7 | icedove | 38.6.0-1~deb7u1 | DSA-3491-1 |
| Debian 7 | iceweasel | 38.6.0esr-1~deb7u1 | DSA-3457-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 44.0+build3-0ubuntu0.14.04.1 | USN-2880-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:38.6.0+build1-0ubuntu0.14.04.1 | USN-2904-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +1 | 38.6.0-1.el7_2 | RHSA-2016:0258, RHSA-2016:0071 |
| RHEL 6 | firefox +1 | 38.6.0-1.el6_7 | RHSA-2016:0258, RHSA-2016:0071 |
| RHEL 5 | firefox +1 | 38.6.0-1.el5_11 | RHSA-2016:0258, RHSA-2016:0071 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 38.6.0-1.el5_11 | RHSA-2016:0258 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 38.6.0esr-57.3 | SUSE-SU-2016:0338-1 |
| SLES 12 SP1 | MozillaFirefox-branding-SLE | 31.0-20.1 | SUSE-SU-2016:0338-1 |
| SLES 12 SP1 | mozilla-nss | 3.20.2-37.1 | SUSE-SU-2016:0338-1 |
| SLES 12 | MozillaFirefox | 38.6.0esr-57.3 | SUSE-SU-2016:0338-1 |
| SLES 12 | MozillaFirefox-branding-SLE | 31.0-20.1 | SUSE-SU-2016:0338-1 |
| SLES 12 | mozilla-nss | 3.20.2-37.1 | SUSE-SU-2016:0338-1 |
| SLES 11 SP4 | MozillaFirefox | 38.6.0esr-31.3 | SUSE-SU-2016:0334-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 38-18.24 | SUSE-SU-2016:0334-1 |
| SLES 11 SP4 | mozilla-nss | 3.20.2-25.2 | SUSE-SU-2016:0334-1 |
| SLES 11 SP3 | MozillaFirefox | 38.6.0esr-31.3 | SUSE-SU-2016:0334-1 |
| SLES 11 SP3 | MozillaFirefox-branding-SLED | 38-18.24 | SUSE-SU-2016:0334-1 |
| SLES 11 SP3 | mozilla-nss | 3.20.2-25.2 | SUSE-SU-2016:0334-1 |
| SLES 11 SP2 | MozillaFirefox | 38.6.1esr-33.1 | SUSE-SU-2016:0584-1 |
| SLES 11 SP2 | MozillaFirefox-branding-SLED | 38-15.58 | SUSE-SU-2016:0584-1 |
| SLES 11 SP2 | mozilla-nss | 3.20.2-17.5 | SUSE-SU-2016:0584-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | MozillaFirefox | 38.6.0esr-57.3 | SUSE-SU-2016:0338-1 |
| SLES for SAP 12 SP1 | MozillaFirefox-branding-SLE | 31.0-20.1 | SUSE-SU-2016:0338-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.20.2-37.1 | SUSE-SU-2016:0338-1 |
| SLES for SAP 12 | MozillaFirefox | 38.6.0esr-57.3 | SUSE-SU-2016:0338-1 |
| SLES for SAP 12 | MozillaFirefox-branding-SLE | 31.0-20.1 | SUSE-SU-2016:0338-1 |
| SLES for SAP 12 | mozilla-nss | 3.20.2-37.1 | SUSE-SU-2016:0338-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.6.0esr-31.3 | SUSE-SU-2016:0334-1 |
| SLES for SAP 11 SP4 | MozillaFirefox-branding-SLED | 38-18.24 | SUSE-SU-2016:0334-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.20.2-25.2 | SUSE-SU-2016:0334-1 |
| SLES for SAP 11 SP3 | MozillaFirefox | 38.6.0esr-31.3 | SUSE-SU-2016:0334-1 |
| SLES for SAP 11 SP3 | MozillaFirefox-branding-SLED | 38-18.24 | SUSE-SU-2016:0334-1 |
| SLES for SAP 11 SP3 | mozilla-nss | 3.20.2-25.2 | SUSE-SU-2016:0334-1 |
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 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox +1 | 38.6.0-1.0.1.el7_2 | ELSA-2016-0258, ELSA-2016-0071 |
Advisories 14
- RHSA-2016:0258 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2016:0071 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2904-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2880-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3457-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3491-1 icedove - 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-2016:0334-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLED, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0584-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLED, MozillaFirefox-branding-SLES-for-VMware, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0338-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE, mozilla-nss 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-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2016-0258 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 18, 2016
- ELSA-2016-0071 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 27, 2016
References
- DSA-3457 vendor-advisory
- DSA-3491 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1234571
- openSUSE-SU-2016:0492 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1223670
- 1034825 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1234280
- https://bugzilla.mozilla.org/show_bug.cgi?id=1221385
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- RHSA-2016:0071 vendor-advisory
- USN-2880-1 vendor-advisory
- http://www.mozilla.org/security/announce/2016/mfsa2016-01.html
- USN-2880-2 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1224200
- https://bugzilla.mozilla.org/show_bug.cgi?id=1233152
- https://bugzilla.mozilla.org/show_bug.cgi?id=1230668
- RHSA-2016:0258 vendor-advisory
- SUSE-SU-2016:0338 vendor-advisory
- openSUSE-SU-2016:0309 vendor-advisory
- USN-2904-1 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1230639
- 81953 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1230686
- GLSA-201605-06 vendor-advisory
- openSUSE-SU-2016:0488 vendor-advisory
- openSUSE-SU-2016:0306 vendor-advisory
- openSUSE-SU-2016:0310 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1233346
- https://bugzilla.mozilla.org/show_bug.cgi?id=1230483
- https://bugzilla.mozilla.org/show_bug.cgi?id=1233925