Description
Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 39.0 and Firefox ESR 31.x before 31.8 and 38.x before 38.1 allows remote attackers to execute arbitrary code via vectors involving attachment of an XMLHttpRequest object to a dedicated worker.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 39.0+build5-0ubuntu0.14.04.1 | USN-2656-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 38.1.0-1.el7_1 | RHSA-2015:1207 |
| RHEL 6 | firefox | 38.1.0-1.el6_6 | RHSA-2015:1207 |
| RHEL 5 | firefox | 38.1.0-1.el5_11 | RHSA-2015:1207 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 31.8.0esr-37.3 | SUSE-SU-2015:1269-1 |
| SLES 12 | mozilla-nspr | 4.10.8-3.1 | SUSE-SU-2015:1269-1 |
| SLES 12 | mozilla-nss | 3.19.2_CKBI_1.98-21.1 | SUSE-SU-2015:1269-1 |
| SLES 11 SP4 | MozillaFirefox | 31.8.0esr-0.10.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES 11 SP4 | mozilla-nspr | 4.10.8-0.5.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES 11 SP4 | mozilla-nss | 3.19.2_CKBI_1.98-0.10.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES 11 SP3 | MozillaFirefox | 31.8.0esr-0.10.1 | SUSE-SU-2015:1268-2 |
| SLES 11 SP3 | mozilla-nspr | 4.10.8-0.5.1 | SUSE-SU-2015:1268-2 |
| SLES 11 SP3 | mozilla-nss | 3.19.2_CKBI_1.98-0.10.1 | SUSE-SU-2015:1268-2 |
| 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 | 31.8.0esr-37.3 | SUSE-SU-2015:1269-1 |
| SLES for SAP 12 | mozilla-nspr | 4.10.8-3.1 | SUSE-SU-2015:1269-1 |
| SLES for SAP 12 | mozilla-nss | 3.19.2_CKBI_1.98-21.1 | SUSE-SU-2015:1269-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 31.8.0esr-0.10.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.10.8-0.5.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.19.2_CKBI_1.98-0.10.1 | SUSE-SU-2015:1268-2, SUSE-SU-2015:1268-1 |
| SLES for SAP 11 SP3 | MozillaFirefox | 31.8.0esr-0.10.1 | SUSE-SU-2015:1268-2 |
| SLES for SAP 11 SP3 | mozilla-nspr | 4.10.8-0.5.1 | SUSE-SU-2015:1268-2 |
| SLES for SAP 11 SP3 | mozilla-nss | 3.19.2_CKBI_1.98-0.10.1 | SUSE-SU-2015:1268-2 |
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 | 38.1.0-1.0.1.el7_1 | ELSA-2015-1207 |
Advisories 9
- RHSA-2015:1207 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2656-1 firefox vulnerabilities Ubuntu Security Notices (USN) · May 29, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1268-2 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1268-1 Security update for MozillaFirefox, mozilla-nspr, 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
- SUSE-SU-2015:1269-1 Security update for MozillaFirefox, 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-2015-1207 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 3, 2015
References
- openSUSE-SU-2015:1229 vendor-advisory
- SUSE-SU-2015:1268 vendor-advisory
- GLSA-201512-10 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1169867
- 75541 vdb-entry
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- 1032784 vdb-entry
- RHSA-2015:1207 vendor-advisory
- SUSE-SU-2015:1269 vendor-advisory
- openSUSE-SU-2015:1266 vendor-advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-65.html
- USN-2656-1 vendor-advisory
- SUSE-SU-2015:1449 vendor-advisory
- 1032783 vdb-entry
- USN-2656-2 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html