Description
An integer overflow can occur in the Skia library due to 32-bit integer use in an array without integer overflow checks, resulting in possible out-of-bounds writes. This could lead to a potentially exploitable crash triggerable by web content. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 52.8 | 52.8 |
| Mozilla | Thunderbird ESR | unspecified – < 52.8 | 52.8 |
| Mozilla | Firefox | unspecified – < 60 | 60 |
| Mozilla | Firefox ESR | unspecified – < 52.8 | 52.8 |
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 | 52.8.0esr-1 | — |
| Debian 14 | thunderbird | 1:52.8.0-1 | — |
| Debian 13 | firefox-esr | 52.8.0esr-1 | — |
| Debian 13 | thunderbird | 1:52.8.0-1 | — |
| Debian 12 | firefox-esr | 52.8.0esr-1 | — |
| Debian 12 | thunderbird | 1:52.8.0-1 | — |
| Debian 9 | firefox-esr | 52.8.0esr-1~deb9u1 | DSA-4199-1 |
| Debian 9 | thunderbird | 1:52.8.0-1~deb9u1 | DSA-4209-1 |
| Debian 8 | firefox-esr | 52.8.0esr-1~deb8u1 | DSA-4199-1 |
| Debian 8 | thunderbird | 1:52.8.0-1~deb8u1 | DSA-4209-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | firefox-esr | 52.8.0esr-1~deb7u1 | DLA-1376-1 |
| Debian 7 | thunderbird | 1:52.8.0-1~deb7u1 | DLA-1382-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | firefox | 60.0+build2-0ubuntu1 | USN-3645-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.18.04.1 | USN-3660-1 |
| Ubuntu 16.04 LTS | firefox | 60.0+build2-0ubuntu0.16.04.1 | USN-3645-1 |
| Ubuntu 16.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.16.04.1 | USN-3660-1 |
| Ubuntu 14.04 LTS | firefox | 60.0+build2-0ubuntu0.14.04.1 | USN-3645-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:52.8.0+build1-0ubuntu0.14.04.1 | USN-3660-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +1 | 52.8.0-1.el7_5 | RHSA-2018:1725, RHSA-2018:1415 |
| RHEL 6 | firefox | 52.8.0-1.el6_9 | RHSA-2018:1414 |
| RHEL 6 | thunderbird | 52.8.0-2.el6_9 | RHSA-2018:1726 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | MozillaFirefox | 52.9.0esr-3.7.12 | SUSE-SU-2018:2298-1 |
| SLES 12 SP5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES 12 SP4 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES 12 SP3 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES 12 SP2 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-2, SUSE-SU-2018:1334-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES 12 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2018:1334-1 |
| SLES 11 SP4 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SLES 11 SP3 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SUSE OpenStack Cloud Crowbar 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE OpenStack Cloud 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2019:2872-1, SUSE-SU-2018:1334-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 52.8.0esr-72.32.1 | SUSE-SU-2018:1319-1 |
| SUSE HPE Helion OpenStack 8 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE Enterprise Storage 5 | MozillaFirefox | 68.2.0-109.95.2 | SUSE-SU-2019:2872-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 52.8.0esr-109.31.2 | SUSE-SU-2018:1334-1 |
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 | 52.8.0-1.amzn2 | ALAS2-2018-1032 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox +1 | 52.8.0-1.0.1.el7_5 | ELSA-2018-1725, ELSA-2018-1415 |
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
- Skia and Firefox - Integer Overflow in SkTDArray Leading to Out-of-Bounds Write EDB-44759 · dos · May 25, 2018 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 21
- RHSA-2018:1726 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1725 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1415 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:1414 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-3660-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3645-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4199-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4209-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1376-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1382-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:2872-1 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
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1319-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1334-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1334-2 Security update for MozillaFirefox 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
- ALAS2-2018-1032 Critical: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 11, 2018
- ELSA-2018-1725 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 24, 2018
- ELSA-2018-1415 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 14, 2018
References
- RHSA-2018:1415 vendor-advisory
- GLSA-201810-01 vendor-advisory
- RHSA-2018:1726 vendor-advisory
- RHSA-2018:1414 vendor-advisory
- GLSA-201811-13 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-13/
- 44759 exploit
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- USN-3660-1 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1441941
- 1040896 vdb-entry
- DSA-4199 vendor-advisory
- USN-3645-1 vendor-advisory
- [debian-lts-announce] 20180525 [SECURITY] [DLA 1382-1] thunderbird security update mailing-list
- [debian-lts-announce] 20180511 [SECURITY] [DLA 1376-1] firefox-esr security update mailing-list
- RHSA-2018:1725 vendor-advisory
- DSA-4209 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- 104136 vdb-entry