CVE-2017-5436

An out-of-bounds write in the Graphite 2 library triggered with a maliciously crafted Graphite font. This results in a potentially exploitable crash. This issue was fixed in the Graphite 2 library as well as Mozilla products. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-25)

CWE

CWE-787

Published

2018-06-11

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

Affected

• debian:debian_linux
• mozilla:firefox
• mozilla:thunderbird
• redhat:enterprise_linux
• redhat:enterprise_linux_desktop
• redhat:enterprise_linux_server
• redhat:enterprise_linux_server_aus
• redhat:enterprise_linux_server_eus
• redhat:enterprise_linux_workstation
• sil:graphite2

References

• http://www.securityfocus.com/bid/97940
• http://www.securitytracker.com/id/1038320
• https://access.redhat.com/errata/RHSA-2017:1104
• https://access.redhat.com/errata/RHSA-2017:1106
• https://access.redhat.com/errata/RHSA-2017:1201

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