CVE-2016-1978: Mozilla Firefox

High severity, CVSS 7.3. EPSS: 2.4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the ssl3_HandleECDHServerKeyExchange function in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, allows remote attackers to cause a denial of service or possibly have unspecified other impact by making an SSL (1) DHE or (2) ECDHE handshake at a time of high memory consumption.

Affected products

• Mozilla Firefox: up to and including 43.0.4
• Mozilla Network Security Services: up to and including 3.20.1

Published 2016-03-13. Last modified 2026-06-17.