Description
A buffer overflow can occur when rendering canvas content while adjusting the height and width of the canvas element dynamically, causing data to be written outside of the currently computed boundaries. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 60, unspecified – < 52.9 | 60 |
| Mozilla | Firefox ESR | unspecified – < 60.1, unspecified – < 52.9 | 60.1 |
| Mozilla | Firefox | unspecified – < 61 | 61 |
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 | 52.9.0esr-1 | — |
| Debian 14 | thunderbird | 1:52.9.0-1 | — |
| Debian 13 | firefox-esr | 52.9.0esr-1 | — |
| Debian 13 | thunderbird | 1:52.9.0-1 | — |
| Debian 12 | firefox-esr | 52.9.0esr-1 | — |
| Debian 12 | thunderbird | 1:52.9.0-1 | — |
| Debian 9 | firefox-esr | 52.9.0esr-1~deb9u1 | DSA-4235-1 |
| Debian 9 | thunderbird | 1:52.9.1-1~deb9u1 | DSA-4244-1 |
| Debian 8 | firefox-esr | 52.9.0esr-1~deb8u1 | DLA-1406-1 |
| Debian 8 | thunderbird | 1:52.9.1-1~deb8u1 | DLA-1425-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | firefox | 61.0+build3-0ubuntu0.18.04.1 | USN-3705-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:52.9.1+build3-0ubuntu0.18.04.1 | USN-3714-1 |
| Ubuntu 16.04 LTS | firefox | 61.0+build3-0ubuntu0.16.04.2 | USN-3705-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:52.9.1+build3-0ubuntu0.16.04.1 | USN-3714-1 |
| Ubuntu 14.04 LTS | firefox | 61.0+build3-0ubuntu0.14.04.2 | USN-3705-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:52.9.1+build3-0ubuntu0.14.04.1 | USN-3714-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 60.1.0-4.el7_5 | RHSA-2018:2113 |
| RHEL 7 | thunderbird | 52.9.1-1.el7_5 | RHSA-2018:2252 |
| RHEL 6 | firefox | 60.1.0-5.el6 | RHSA-2018:2112 |
| RHEL 6 | thunderbird | 52.9.1-1.el6 | RHSA-2018:2251 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | MozillaFirefox | 52.9.0esr-3.7.12 | SUSE-SU-2018:2298-1 |
| SLES 15 | MozillaThunderbird | 52.9.1-3.7.1 | SUSE-SU-2018:3247-1, SUSE-SU-2018:2174-1 |
| SLES 12 SP3 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SLES 12 SP2 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-2, SUSE-SU-2018:2322-1 |
| SLES 12 SP1 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SLES 12 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | MozillaFirefox | 52.9.0esr-72.38.6 | SUSE-SU-2018:2325-1 |
| SLES 11 SP3 | MozillaFirefox | 52.9.0esr-72.38.6 | SUSE-SU-2018:2325-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 52.9.0esr-72.38.6 | SUSE-SU-2018:2325-1 |
| SUSE Package Hub 15 | seamonkey | 2.49.4-bp150.3.3.1 | openSUSE-SU-2018:2807-1 |
| SUSE Package Hub 12 | MozillaThunderbird | 60.3.0-74.2 | openSUSE-SU-2018:3687-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 52.9.0esr-72.38.6 | SUSE-SU-2018:2325-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 52.9.0esr-109.38.2 | SUSE-SU-2018:2322-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| 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 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 52.9.1-1.amzn2 | ALAS2-2018-1061 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 60.1.0-4.0.1.el7_5 | ELSA-2018-2113 |
| Oracle Linux 7 | thunderbird | 52.9.1-1.0.1.el7_5 | ELSA-2018-2252 |
Advisories 24
- RHSA-2018:2113 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2018:2112 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2018:2252 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:2251 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-3714-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3705-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4244-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4235-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1406-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1425-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:2322-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2322-2 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2298-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3247-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2174-1 Security update for Mozilla Thunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2325-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:3687-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2018:2807-1 Security update for seamonkey 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-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ALAS2-2018-1061 Critical: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 21, 2018
- ELSA-2018-2252 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 24, 2018
- ELSA-2018-2113 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 4, 2018
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1459162
- GLSA-201810-01 vendor-advisory
- 104555 vdb-entry
- https://www.mozilla.org/security/advisories/mfsa2018-15/
- RHSA-2018:2112 vendor-advisory
- GLSA-201811-13 vendor-advisory
- DSA-4235 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-18/
- RHSA-2018:2113 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-16/
- DSA-4244 vendor-advisory
- 1041193 vdb-entry
- https://www.mozilla.org/security/advisories/mfsa2018-19/
- RHSA-2018:2252 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-17/
- [debian-lts-announce] 20180714 [SECURITY] [DLA 1425-1] thunderbird security update mailing-list
- RHSA-2018:2251 vendor-advisory
- USN-3705-1 vendor-advisory
- USN-3714-1 vendor-advisory
- [debian-lts-announce] 20180629 [SECURITY] [DLA 1406-1] firefox-esr security update mailing-list