CVE-2019-17017: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 2.5% chance of exploitation in the next 30 days.

Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.04 only; version 19.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Mozilla Firefox: before 72.0 (fixed in 72.0)
• Mozilla Firefox ESR: before 68.4 (fixed in 68.4)
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.7 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only

Published 2020-01-08. Last modified 2026-06-17.