Description
The decrease_ref_count function in libvpx in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via malformed WebM video data.
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 | libvpx | 1.4.0-1 | — |
| Debian 13 | libvpx | 1.4.0-1 | — |
| Debian 12 | libvpx | 1.4.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 40.0+build4-0ubuntu0.14.04.1 | USN-2702-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 38.2.0-4.el7_1 | RHSA-2015:1586 |
| RHEL 6 | firefox | 38.2.0-4.el6_7 | RHSA-2015:1586 |
| RHEL 5 | firefox | 38.2.0-4.el5_11 | RHSA-2015:1586 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 38.2.1esr-45.1 | SUSE-SU-2015:1476-1 |
| SLES 12 | MozillaFirefox-branding-SLE | 31.0-14.1 | SUSE-SU-2015:1476-1 |
| SLES 12 | mozilla-nss | 3.19.2.0-26.2 | SUSE-SU-2015:1476-1 |
| SLES 11 SP4 | MozillaFirefox | 38.2.1esr-19.3 | SUSE-SU-2015:1528-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 31.0-0.12.51 | SUSE-SU-2015:1528-1 |
| SLES 11 SP4 | mozilla-nss | 3.19.2.0-0.16.1 | SUSE-SU-2015:1528-1 |
| SLES 11 SP3 | MozillaFirefox | 38.2.1esr-19.3 | SUSE-SU-2015:1528-1 |
| SLES 11 SP3 | MozillaFirefox-branding-SLED | 31.0-0.12.51 | SUSE-SU-2015:1528-1 |
| SLES 11 SP3 | mozilla-nss | 3.19.2.0-0.16.1 | SUSE-SU-2015:1528-1 |
| SLES 11 SP2 | MozillaFirefox | 38.2.0esr-10.1 | SUSE-SU-2015:1449-1 |
| SLES 11 SP2 | MozillaFirefox-branding-SLED | 31.0-0.5.7.11 | SUSE-SU-2015:1449-1 |
| SLES 11 SP2 | firefox-gcc47 | 4.7.2_20130108-0.37.2 | SUSE-SU-2015:1449-1 |
| SLES 11 SP2 | mozilla-nss | 3.19.2.0-0.7.1 | SUSE-SU-2015:1449-1 |
| SLES 11 SP1 | MozillaFirefox | 38.2.0esr-10.1 | SUSE-SU-2015:1449-1 |
| SLES 11 SP1 | MozillaFirefox-branding-SLED | 31.0-0.5.7.11 | SUSE-SU-2015:1449-1 |
| SLES 11 SP1 | firefox-gcc47 | 4.7.2_20130108-0.37.2 | SUSE-SU-2015:1449-1 |
| SLES 11 SP1 | mozilla-nss | 3.19.2.0-0.7.1 | SUSE-SU-2015:1449-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | MozillaFirefox | 38.2.1esr-45.1 | SUSE-SU-2015:1476-1 |
| SLES for SAP 12 | MozillaFirefox-branding-SLE | 31.0-14.1 | SUSE-SU-2015:1476-1 |
| SLES for SAP 12 | mozilla-nss | 3.19.2.0-26.2 | SUSE-SU-2015:1476-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.2.1esr-19.3 | SUSE-SU-2015:1528-1 |
| SLES for SAP 11 SP4 | MozillaFirefox-branding-SLED | 31.0-0.12.51 | SUSE-SU-2015:1528-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.19.2.0-0.16.1 | SUSE-SU-2015:1528-1 |
| SLES for SAP 11 SP3 | MozillaFirefox | 38.2.1esr-19.3 | SUSE-SU-2015:1528-1 |
| SLES for SAP 11 SP3 | MozillaFirefox-branding-SLED | 31.0-0.12.51 | SUSE-SU-2015:1528-1 |
| SLES for SAP 11 SP3 | mozilla-nss | 3.19.2.0-0.16.1 | SUSE-SU-2015:1528-1 |
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 | 38.2.0-4.0.1.el7_1 | ELSA-2015-1586 |
Advisories 8
- RHSA-2015:1586 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-2702-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1476-1 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1449-1 Security update for MozillaFirefox, 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
- SUSE-SU-2015:1528-1 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2015-1586 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 11, 2015
References
- SUSE-SU-2015:2081 vendor-advisory
- openSUSE-SU-2015:1454 vendor-advisory
- USN-2702-3 vendor-advisory
- openSUSE-SU-2015:1389 vendor-advisory
- openSUSE-SU-2015:1453 vendor-advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-89.html
- RHSA-2015:1586 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- SUSE-SU-2015:1528 vendor-advisory
- 1033247 vdb-entry
- USN-2702-2 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1178148
- USN-2702-1 vendor-advisory
- GLSA-201605-06 vendor-advisory
- SUSE-SU-2015:1449 vendor-advisory
- openSUSE-SU-2015:1390 vendor-advisory