CVE-2016-1979: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 2.2% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the PK11_ImportDERPrivateKeyInfoAndReturnKey function in Mozilla Network Security Services (NSS) before 3.21.1, as used in Mozilla Firefox before 45.0, allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted key data with DER encoding.

Affected products

• Mozilla Firefox: up to and including 44.0.2
• Mozilla Network Security Services: up to and including 3.21

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