CVE-2016-9899: Debian Linux

Critical severity, CVSS 9.8. EPSS: 21.1% chance of exploitation in the next 30 days.

Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

Affected products

• Debian Debian Linux: version 9.0 only
• Mozilla Firefox: from 52.0, before 52.1.0 (fixed in 52.1.0); before 53.0 (fixed in 53.0); before 45.9.0 (fixed in 45.9.0)
• Mozilla Thunderbird: before 52.1.0 (fixed in 52.1.0)
• Red Hat Enterprise Linux: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only
• Red Hat Enterprise Linux Server Eus: version 7.3 only; version 7.4 only; version 7.5 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only; version 7.0 only

Published 2018-06-11. Last modified 2026-06-17.