CVE-2016-1962: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 6.1% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the mozilla::DataChannelConnection::Close function in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 allows remote attackers to execute arbitrary code by leveraging mishandling of WebRTC data-channel connections.

Affected products

• Mozilla Firefox: up to and including 44.0.2; version 38.0 only; version 38.0.1 only; version 38.0.5 only; version 38.1.0 only; version 38.1.1 only; …
• Opensuse Opensuse: version 13.1 only
• Oracle Linux: version 5.0 only; version 6 only; version 7 only

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