Description
Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 50.1 | 50.1 |
| Mozilla | Firefox ESR | unspecified – < 45.6 | 45.6 |
| Mozilla | Thunderbird | unspecified – < 45.6 | 45.6 |
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 | 45.6.0esr-1 | — |
| Debian 13 | firefox-esr | 45.6.0esr-1 | — |
| Debian 12 | firefox-esr | 45.6.0esr-1 | — |
| Debian 8 | firefox-esr | 45.6.0esr-1~deb8u1 | DSA-3734-1 |
| Debian 8 | icedove | 1:45.6.0-1~deb8u1 | DSA-3757-1 |
| Debian 7 | firefox-esr | 45.6.0esr-1~deb7u1 | DLA-743-1 |
| Debian 7 | icedove | 1:45.6.0-2~deb7u1 | DLA-782-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | firefox | 50.1.0+build2-0ubuntu0.16.04.1 | USN-3155-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:45.7.0+build1-0ubuntu0.16.04.1 | USN-3165-1 |
| Ubuntu 14.04 LTS | firefox | 50.1.0+build2-0ubuntu0.14.04.1 | USN-3155-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:45.7.0+build1-0ubuntu0.14.04.1 | USN-3165-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +1 | 45.6.0-1.el7_3 | RHSA-2016:2973, RHSA-2016:2946 |
| RHEL 6 | firefox +1 | 45.6.0-1.el6_8 | RHSA-2016:2973, RHSA-2016:2946 |
| RHEL 5 | firefox +1 | 45.6.0-1.el5_11 | RHSA-2016:2973, RHSA-2016:2946 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 45.6.0-1.el5_11 | RHSA-2016:2973 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 12 SP1 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 12 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 11 SP4 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SLES 11 SP3 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP2 | MozillaFirefox | 45.6.0esr-66.1 | SUSE-SU-2016:3223-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 12 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Package Hub 12 | MozillaThunderbird | 45.6.0-20.1 | openSUSE-SU-2016:3308-1, openSUSE-SU-2016:3307-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Manager 2.1 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | firefox-esr | 45.6.0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox +1 | 45.6.0-1.0.1.el7_3 | ELSA-2016-2973, ELSA-2016-2946 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Mozilla Firefox < 50.1.0 - Use-After-Free EDB-41042 · dos · Jan 13, 2017
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 18
- RHSA-2016:2973 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:2946 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3165-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3155-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-782-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3734-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3757-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-743-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:3210-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3222-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2016:3308-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2016:3307-1 Security update for MozillaThunderbird 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
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2016:3223-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2016-2973 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 21, 2016
- ELSA-2016-2946 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 14, 2016
References
- https://www.mozilla.org/security/advisories/mfsa2016-94/
- https://www.mozilla.org/security/advisories/mfsa2016-95/
- 94885 vdb-entry
- 1037461 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1317409
- GLSA-201701-15 vendor-advisory
- DSA-3757 vendor-advisory
- 41042 exploit
- RHSA-2016:2973 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2016-96/
- RHSA-2016:2946 vendor-advisory