CVE-2015-4522: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

The nsUnicodeToUTF8::GetMaxLength function in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 might allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via unknown vectors, related to an "overflow."

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 2015-09-24. Last modified 2026-06-17.