Description
The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, related to an "overflow."
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 8 | icedove | 38.4.0-1~deb8u1 | DSA-3410-1 |
| Debian 8 | iceweasel | 38.2.0esr-1~deb8u1 | DSA-3333-1 |
| Debian 7 | icedove | 38.4.0-1~deb7u1 | DSA-3410-1 |
| Debian 7 | iceweasel | 38.2.0esr-1~deb7u1 | DSA-3333-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 40.0+build4-0ubuntu0.14.04.1 | USN-2702-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:38.2.0+build1-0ubuntu0.14.04.1 | USN-2712-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 38.2.0-4.el7_1 | RHSA-2015:1586 |
| RHEL 7 | thunderbird | 38.2.0-1.ael7b_1 | RHSA-2015:1682 |
| RHEL 6 | firefox +1 | 38.2.0-4.el6_7 | RHSA-2015:1682, RHSA-2015:1586 |
| RHEL 5 | firefox +1 | 38.2.0-4.el5_11 | RHSA-2015:1682, RHSA-2015:1586 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 38.2.0-4.el5_11 | RHSA-2015:1682 |
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 |
| 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 | 38.2.0-4.0.1.el7_1 | ELSA-2015-1586 |
| Oracle Linux 7 | thunderbird | 38.2.0-4.0.1.el6_7 | ELSA-2015-1682 |
Advisories 14
- RHSA-2015:1586 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2015:1682 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2712-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2702-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3333-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3410-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 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-2024:14572-1 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
- SUSE-SU-2015:1528-1 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2015-1682 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 25, 2015
- ELSA-2015-1586 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 11, 2015
References
- DSA-3410 vendor-advisory
- SUSE-SU-2015:2081 vendor-advisory
- USN-2712-1 vendor-advisory
- openSUSE-SU-2015:1454 vendor-advisory
- USN-2702-3 vendor-advisory
- RHSA-2015:1682 vendor-advisory
- openSUSE-SU-2015:1389 vendor-advisory
- openSUSE-SU-2015:1453 vendor-advisory
- 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=1171603
- USN-2702-1 vendor-advisory
- GLSA-201605-06 vendor-advisory
- 1033372 vdb-entry
- SUSE-SU-2015:1449 vendor-advisory
- DSA-3333 vendor-advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-90.html
- openSUSE-SU-2015:1390 vendor-advisory