CVE-2015-7189: Mozilla Firefox

Medium severity, CVSS 6.8. EPSS: 3.1% chance of exploitation in the next 30 days.

Race condition in the JPEGEncoder function in Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer overflow) via vectors involving a CANVAS element and crafted JavaScript code.

Affected products

• Mozilla Firefox: version 38.0 only; version 38.0.1 only; version 38.0.5 only; version 38.1.0 only; version 38.1.1 only; version 38.2.0 only; …

Published 2015-11-05. Last modified 2026-06-17.