CVE-2016-5290: Debian Linux

Critical severity, CVSS 9.8. EPSS: 3.2% chance of exploitation in the next 30 days.

Memory safety bugs were reported in Firefox 49 and Firefox ESR 45.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

Affected products

• Debian Debian Linux: version 8.0 only
• Mozilla Firefox: before 45.5.0 (fixed in 45.5.0); before 50.0 (fixed in 50.0)
• Mozilla Thunderbird: before 45.5.0 (fixed in 45.5.0)

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