Description
Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.
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 | 45.2.0esr-1 | — |
| Debian 13 | firefox-esr | 45.2.0esr-1 | — |
| Debian 12 | firefox-esr | 45.2.0esr-1 | — |
| Debian 8 | firefox-esr | 45.2.0esr-1~deb8u1 | DSA-3600-1 |
| Debian 7 | firefox-esr | 45.2.0esr-1~deb7u1 | DLA-521-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | firefox | 47.0+build3-0ubuntu0.16.04.1 | USN-2993-1 |
| Ubuntu 14.04 LTS | firefox | 47.0+build3-0ubuntu0.14.04.1 | USN-2993-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 45.2.0-1.el7_2 | RHSA-2016:1217 |
| RHEL 6 | firefox | 45.2.0-1.el6_8 | RHSA-2016:1217 |
| RHEL 5 | firefox | 45.2.0-1.el5_11 | RHSA-2016:1217 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 45.2.0esr-75.2 | SUSE-SU-2016:1691-1 |
| SLES 12 SP1 | MozillaFirefox-branding-SLE | 45.0-28.2 | SUSE-SU-2016:1691-1 |
| SLES 12 SP1 | mozilla-nspr | 4.12-15.2 | SUSE-SU-2016:1691-1 |
| SLES 12 SP1 | mozilla-nss | 3.21.1-46.2 | SUSE-SU-2016:1691-1 |
| SLES 12 | MozillaFirefox | 45.2.0esr-75.2 | SUSE-SU-2016:1691-1 |
| SLES 12 | MozillaFirefox-branding-SLE | 45.0-28.2 | SUSE-SU-2016:1691-1 |
| SLES 12 | mozilla-nspr | 4.12-15.2 | SUSE-SU-2016:1691-1 |
| SLES 12 | mozilla-nss | 3.21.1-46.2 | SUSE-SU-2016:1691-1 |
| SLES 11 SP4 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SLES 11 SP4 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP4 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP4 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP3 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SLES 11 SP3 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SLES 11 SP3 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP3 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP3 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SLES 11 SP2 | MozillaFirefox | 45.3.0esr-48.1 | SUSE-SU-2016:2061-1 |
| SLES 11 SP2 | MozillaFirefox-branding-SLED | 45.0-20.38 | SUSE-SU-2016:2061-1 |
| SLES 11 SP2 | firefox-fontconfig | 2.11.0-4.2 | SUSE-SU-2016:2061-1 |
| SLES 11 SP2 | mozilla-nspr | 4.12-25.2 | SUSE-SU-2016:2061-1 |
| SLES 11 SP2 | mozilla-nss | 3.21.1-26.2 | SUSE-SU-2016:2061-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | MozillaFirefox | 45.2.0esr-75.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 SP1 | MozillaFirefox-branding-SLE | 45.0-28.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 SP1 | mozilla-nspr | 4.12-15.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.21.1-46.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 | MozillaFirefox | 45.2.0esr-75.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 | MozillaFirefox-branding-SLE | 45.0-28.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 | mozilla-nspr | 4.12-15.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 12 | mozilla-nss | 3.21.1-46.2 | SUSE-SU-2016:1691-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SLES for SAP 11 SP4 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SLES for SAP 11 SP4 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SUSE OpenStack Cloud 5 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SUSE OpenStack Cloud 5 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SUSE OpenStack Cloud 5 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SUSE Manager Proxy 2.1 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager Proxy 2.1 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager Proxy 2.1 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager 2.1 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SUSE Manager 2.1 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SUSE Manager 2.1 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager 2.1 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SUSE Manager 2.1 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 45.2.0esr-45.2 | SUSE-SU-2016:1799-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox-branding-SLED | 45.0-23.10 | SUSE-SU-2016:1799-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | firefox-fontconfig | 2.11.0-2.1 | SUSE-SU-2016:1799-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nspr | 4.12-29.1 | SUSE-SU-2016:1799-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nss | 3.21.1-35.1 | SUSE-SU-2016:1799-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| 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 | 45.2.0-1.0.1.el7_2 | ELSA-2016-1217 |
Advisories 10
- RHSA-2016:1217 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2993-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-521-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3600-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2061-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLED, mozilla-nspr and mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1799-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE and 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
- SUSE-SU-2016:1691-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE, mozilla-nspr, mozilla-nss 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-2016-1217 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 8, 2016
References
- 1036057 vdb-entry
- http://www.mozilla.org/security/announce/2016/mfsa2016-51.html
- RHSA-2016:1217 vendor-advisory
- openSUSE-SU-2016:1557 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- openSUSE-SU-2016:1552 vendor-advisory
- USN-2993-1 vendor-advisory
- SUSE-SU-2016:1691 vendor-advisory
- 91075 vdb-entry
- DSA-3600 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1271460