Description
Use-after-free vulnerability in the mozilla::DataChannelConnection::Close function in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 allows remote attackers to execute arbitrary code by leveraging mishandling of WebRTC data-channel connections.
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 | 45.0esr-1 | — |
| Debian 13 | firefox-esr | 45.0esr-1 | — |
| Debian 12 | firefox-esr | 45.0esr-1 | — |
| Debian 8 | icedove | 38.7.0-1~deb8u1 | DSA-3520-1 |
| Debian 8 | iceweasel | 38.7.0esr-1~deb8u1 | DSA-3510-1 |
| Debian 7 | icedove | 38.7.0-1~deb7u1 | DSA-3520-1 |
| Debian 7 | iceweasel | 38.7.0esr-1~deb7u1 | DSA-3510-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 45.0+build2-0ubuntu0.14.04.1 | USN-2917-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 38.7.0-1.el7_2 | RHSA-2016:0373 |
| RHEL 6 | firefox | 38.7.0-1.el6_7 | RHSA-2016:0373 |
| RHEL 5 | firefox | 38.7.0-1.el5_11 | RHSA-2016:0373 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2016:0727-1 |
| SLES 12 SP1 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2016:0727-1 |
| SLES 12 SP1 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2016:0727-1 |
| SLES 12 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2016:0727-1 |
| SLES 12 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2016:0727-1 |
| SLES 12 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2016:0727-1 |
| SLES 11 SP4 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2016:0777-1 |
| SLES 11 SP4 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2016:0777-1 |
| SLES 11 SP4 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2016:0777-1 |
| SLES 11 SP3 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2016:0777-1 |
| SLES 11 SP2 | MozillaFirefox | 38.7.0esr-36.3 | SUSE-SU-2016:0909-1 |
| SLES 11 SP2 | mozilla-nspr | 4.12-19.1 | SUSE-SU-2016:0909-1 |
| SLES 11 SP2 | mozilla-nss | 3.20.2-20.1 | SUSE-SU-2016:0909-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2016:0727-1 |
| SLES for SAP 12 SP1 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2016:0727-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | MozillaFirefox | 38.7.0esr-63.3 | SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | mozilla-nspr | 4.12-12.1 | SUSE-SU-2016:0727-1 |
| SLES for SAP 12 | mozilla-nss | 3.20.2-40.1 | SUSE-SU-2016:0727-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.7.0esr-37.3 | SUSE-SU-2016:0777-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.12-24.1 | SUSE-SU-2016:0777-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.20.2-28.1 | SUSE-SU-2016:0777-1 |
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 | 38.7.0-1.0.1.el7_2 | ELSA-2016-0373 |
Advisories 11
- RHSA-2016:0373 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2917-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3520-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3510-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:0727-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0909-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0777-1 Security update for MozillaFirefox, mozilla-nspr, 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-2016-0373 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 9, 2016
References
- openSUSE-SU-2016:0894 vendor-advisory
- SUSE-SU-2016:0820 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- openSUSE-SU-2016:0731 vendor-advisory
- SUSE-SU-2016:0727 vendor-advisory
- openSUSE-SU-2016:0876 vendor-advisory
- USN-2917-1 vendor-advisory
- DSA-3520 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1240760
- SUSE-SU-2016:0909 vendor-advisory
- http://www.mozilla.org/security/announce/2016/mfsa2016-25.html
- DSA-3510 vendor-advisory
- openSUSE-SU-2016:0733 vendor-advisory
- 1035215 vdb-entry
- SUSE-SU-2016:0777 vendor-advisory
- GLSA-201605-06 vendor-advisory
- USN-2917-2 vendor-advisory
- USN-2917-3 vendor-advisory