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CVE-2015-5123: Adobe Flash Player Use-After-Free Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-04-13
• EPSS: 18.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-07-14 · updated 2026-06-17
• Weakness: CWE-416

Description

Use-after-free vulnerability in the BitmapData 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 overrides a valueOf function, as exploited in the wild in July 2015.

Affected products

• Adobe Flash Player 24.0.0.186 and earlier.: from 11.0 through 11.2.202.481; from 13.0 through 13.0.0.302; from 18.0 through 18.0.0.203
• Adobe Flash Player Desktop Runtime: from 18.0 through 18.0.0.203
• openSUSE Evergreen: 11.4
• RedHat Enterprise Linux Desktop: 5.0, 6.0
• RedHat Enterprise Linux Server: 5.0, 6.0
• RedHat Enterprise Linux Server Eus: 6.6
• RedHat Enterprise Linux Workstation: 5.0, 6.0
• SUSE Linux Enterprise Server 15 SP1: 11-sp3, 11-sp4, 12
• SUSE Linux Enterprise Workstation Extension: 12

References

• http://blog.trendmicro.com/trendlabs-security-intelligence/new-zero-day-vulnerability-cve-2015-5123-in-adobe-flash-emerges-from-hacking-team-leak/
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00028.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00029.html
• http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00032.html
• http://marc.info/?l=bugtraq&m=144050155601375&w=2
• http://rhn.redhat.com/errata/RHSA-2015-1235.html
• http://www.kb.cert.org/vuls/id/918568
• http://www.securityfocus.com/bid/75710
• http://www.securitytracker.com/id/1032890
• http://www.us-cert.gov/ncas/alerts/TA15-195A
• https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04796784
• https://helpx.adobe.com/security/products/flash-player/apsa15-04.html

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