CVE-2015-5122: Adobe Flash Player Use-After-Free Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-04-13. EPSS: 94% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that leverages improper handling of the opaqueBackground property, as exploited in the wild in July 2015.

Affected products

• Adobe Flash Player: from 13.0, up to and including 13.0.0.302; from 18.0, up to and including 18.0.0.203; from 18.0, up to and including 18.0.0.204; from 11.0, up to and including 11.2.202.481
• Adobe Flash Player Desktop Runtime: from 18.0, up to and including 18.0.0.203
• Opensuse Evergreen: version 11.4 only
• Red Hat Enterprise Linux Desktop: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Server: version 5.0 only; version 6.0 only
• Red Hat Enterprise Linux Server Eus: version 6.6 only
• Red Hat Enterprise Linux Workstation: version 5.0 only; version 6.0 only
• Suse Linux Enterprise Desktop: version 11 only; version 12 only
• Suse Linux Enterprise Workstation Extension: version 12 only

Published 2015-07-14. Last modified 2026-06-17.