CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Adobe Flash Player Use-After-Free Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- The impacted product is end-of-life and should be disconnected if still in use.
Description
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; adobe: flash player desktop runtime; apple: macos; microsoft: windows; linux: linux kernel; microsoft: windows 8; microsoft: windows 8.1; redhat: enterprise linux desktop; redhat: enterprise linux server; redhat: enterprise linux server eus; redhat: enterprise linux workstation; opensuse: evergreen; suse: linux enterprise desktop; suse: linux enterprise workstation extension
References10
- helpx.adobe.com/security/products/flash-player/apsa15-04.html Broken LinkVendor Advisory
- helpx.adobe.com/security/products/flash-player/apsb15-18.html Broken LinkVendor Advisory
- helpx.adobe.com/security/products/flash-player/apsa15-04.html Broken LinkVendor Advisory
- helpx.adobe.com/security/products/flash-player/apsb15-18.html Broken LinkVendor Advisory
- packetstormsecurity.com/files/132663/Adobe-Flash-opaqueBackgrou… ExploitThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/37599/ ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/132663/Adobe-Flash-opaqueBackgrou… ExploitThird Party AdvisoryVDB Entry
- www.exploit-db.com/exploits/37599/ ExploitThird Party AdvisoryVDB Entry
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00028.… Mailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2015-07/msg00029.… Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 87% percentile: 100 · as of 2 November 2026
- CWE
- CWE-416