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.
CVE-2015-5122
CRITICALNVD 9.89.8—Exploited in the wild
EchelonGraph scoreHIGH confidence
Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-04-13), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.
Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
- Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 94%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: —
A fix is available — apply it.
Internet exposure
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- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALhigh confidence
- EG Risk
- 84EG Risk 84/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity98% × 45%Exploitation100% × 40%Automatability0% × 15%CISA SSVC: Track at low, Attend at medium and Act at high mission impact.Action: A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact. - EPSS PROB
- 94%
- EPSS %ILE
- 99th
- KEV
- ⚠ Exploited
CISA SSVCTrack at low, Attend at medium and Act at high mission impact.
A fix is available. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
July 14, 2015
Last Modified
April 21, 2026
Advisory Details (7)
generic
Adobe Flash opaqueBackground Use After Free | Metasploit Module
http://www.rapid7.com/db/modules/exploit/multi/browser/adobe_flash_opaque_background_uafcert
VU#338736 - Adobe Flash ActionScript 3 opaqueBackground use-after-free vulnerability
http://www.kb.cert.org/vuls/id/338736generic
Packet Storm - Human Validation
http://packetstormsecurity.com/files/132663/Adobe-Flash-opaqueBackground-Use-After-Free.htmlgeneric
'[security bulletin] HPSBMU03409 rev.1 - HP Matrix Operating Environment, Multiple Vulnerabilities' - MARC
http://marc.info/?l=bugtraq&m=144050155601375&w=2Vendor Advisories for CVE-2015-5122
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Related CVEs
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Frequently asked(6)
What is CVE-2015-5122?
CVE-2015-5122 is a critical vulnerability published on July 14, 2015. 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…
When was CVE-2015-5122 disclosed?
CVE-2015-5122 was first published on July 14, 2015, with the most recent update on April 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-5122 actively exploited?
Yes. CISA added CVE-2015-5122 to the Known Exploited Vulnerabilities catalog on April 13, 2022, affecting Adobe Flash Player. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. A fix is available. Apply it.
What is the CVSS score of CVE-2015-5122?
CVE-2015-5122 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2015-5122?
CVE-2015-5122 affects Adobe Flash Player.
How do I remediate CVE-2015-5122?
A fix for CVE-2015-5122 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2015-5122
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