Flash PlayerApplication · Adobe

CVE-2015-8056

HIGH · 10.0 CVSS v2.0 Published 2015-12-10

Fix available

A fix is available. Upgrade to after 19.0.0.241 or later.

See remediation →

100/100

Remediation priority · Urgent

Remotely reachable No privileges Zero-click Patch available

Official description

NVD · unedited

Use-after-free vulnerability in Adobe Flash Player before 18.0.0.268 and 19.x and 20.x before 20.0.0.228 on Windows and OS X and before 11.2.202.554 on Linux, Adobe AIR before 20.0.0.204, Adobe AIR SDK before 20.0.0.204, and Adobe AIR SDK & Compiler before 20.0.0.204 allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2015-8048, CVE-2015-8049, CVE-2015-8050, CVE-2015-8055, CVE-2015-8057, CVE-2015-8058, CVE-2015-8059, CVE-2015-8061, CVE-2015-8062, CVE-2015-8063, CVE-2015-8064, CVE-2015-8065, CVE-2015-8066, CVE-2015-8067, CVE-2015-8068, CVE-2015-8069, CVE-2015-8070, CVE-2015-8071, CVE-2015-8401, CVE-2015-8402, CVE-2015-8403, CVE-2015-8404, CVE-2015-8405, CVE-2015-8406, CVE-2015-8410, CVE-2015-8411, CVE-2015-8412, CVE-2015-8413, CVE-2015-8414, CVE-2015-8420, CVE-2015-8421, CVE-2015-8422, CVE-2015-8423, CVE-2015-8424, CVE-2015-8425, CVE-2015-8426, CVE-2015-8427, CVE-2015-8428, CVE-2015-8429, CVE-2015-8430, CVE-2015-8431, CVE-2015-8432, CVE-2015-8433, CVE-2015-8434, CVE-2015-8435, CVE-2015-8436, CVE-2015-8437, CVE-2015-8441, CVE-2015-8442, CVE-2015-8447, CVE-2015-8448, CVE-2015-8449, CVE-2015-8450, CVE-2015-8452, and CVE-2015-8454.

Technical summary

dbcve analysis · high confidence

Use-after-free vulnerability in Adobe Flash Player, Adobe AIR, and AIR SDK allowing arbitrary code execution. The vulnerability affects specific older versions on Windows, OS X, and Linux, and arises from improper memory management where memory is accessed after being freed.

MitigationUpdate to Flash Player 18.0.0.268/20.0.0.228 or later, AIR 20.0.0.204 or later. If Flash is not required, disable or remove it to eliminate the attack surface.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions

NVD · CPE data

Flash PlayerApplication

Affected:<= 18.0.0.261= 19.0.0.185= 19.0.0.207= 19.0.0.226= 19.0.0.245<= 11.2.202.548

Air SdkApplication

Affected:<= 19.0.0.241

Air Sdk \& CompilerApplication

Affected:<= 19.0.0.241

AirApplication

Affected:<= 19.0.0.241

CVSS breakdown

From the vector

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Complete
Integrity: Complete
Availability: Complete

AV:N/AC:L/Au:N/C:C/I:C/A:C

Am I affected?

dbcve checks

Work through these to decide whether this CVE applies to you.

Check if Adobe Flash Player is installed

On Windows, open Add/Remove Programs or check registry key HKEY_LOCAL_MACHINE\SOFTWARE\Macromedia\FlashPlayer. On macOS, check /Library/Application Support/Adobe/Flash Player. On Linux, check /usr/lib/flash-plugin or browser plugin directories.

Affected if Flash Player is found on the system
Determine the installed Flash Player version

For Windows browsers, visit the Adobe version checker page at about:flash or use the Flash Player Help > About page. For Chrome, navigate to chrome://plugins and locate Flash Player details.

Affected if Version matches any of these affected ranges: 18.0.0.261 or earlier, 19.0.0.185, 19.0.0.207, 19.0.0.226, 19.0.0.245, or 11.2.202.548 or earlier (Linux NPAPI)
Check for Adobe AIR runtime installation

On Windows, open Control Panel > Programs and Features and look for Adobe AIR. On macOS, check /Applications for Adobe AIR Installer.app. Note the version shown alongside the product name.

Affected if Adobe AIR is installed with a version of 19.0.0.241 or earlier
Identify Adobe AIR SDK or AIR SDK & Compiler installations

Check common installation directories: Windows typically uses C:\Program Files\Adobe\AIR SDK or C:\Program Files (x86)\Adobe\AIR SDK. On macOS, check /Applications/Adobe AIR SDK. Look for a version file or check the SDK description.

Affected if AIR SDK or AIR SDK & Compiler version is 19.0.0.241 or earlier
Confirm browser plugin exposure

Check installed browser plugins: In Firefox, navigate to about:plugins. In Chrome, go to chrome://extensions and enable developer mode, or visit chrome://components. Verify if Shockwave Flash or Adobe Flash Player plugin is present and note its version.

Affected if Browser plugin version matches the affected Flash Player versions listed above

The environment is affected if Adobe Flash Player version is 18.0.0.261 or earlier, any of 19.0.0.185/207/226/245, or 11.2.202.548 or earlier; or if Adobe AIR/SDK version is 19.0.0.241 or earlier.

Generated from the published advisory. Verify against your own configuration.

Remediation

dbcve · scoped

Upgrade available Upgrade to a release after 19.0.0.241

Vendor patch helpx.adobe.com →

Interim mitigation

Update to Flash Player 18.0.0.268/20.0.0.228 or later, AIR 20.0.0.204 or later. If Flash is not required, disable or remove it to eliminate the attack surface.

Recommended fix High confidence

Flash Player: 18.0.0.268 (Windows/OS X), 11.2.202.554 (Linux), or 20.0.0.228+ | AIR/AIR SDK/AIR SDK & Compiler: 20.0.0.204+

For Flash Player on Windows and OS X: Upgrade to version 18.0.0.268, or upgrade to version 20.0.0.228 or later
For Flash Player on Linux: Upgrade to version 11.2.202.554 or later
For Adobe AIR: Upgrade to version 20.0.0.204 or later
For Adobe AIR SDK: Upgrade to version 20.0.0.204 or later
For Adobe AIR SDK & Compiler: Upgrade to version 20.0.0.204 or later
Alternatively, if available, uninstall Flash Player and AIR as they are deprecated technologies
Ensure the updated version is properly installed and verify via About Adobe Flash Player or AIR

Caveat Flash Player and AIR reached end-of-life in December 2020; consider migrating away from these technologies

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Flash Player Scoped from the published advisory

Consultation3.0 h
Implementation4.0 h
Testing3.0 h
Review / QA2.0 h

12.0 hours of engineering $2,130

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Scan for this in your stack

Free · runs locally

dbcve dependency scanner

Check whether your project pulls in CVE-2015-8056 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

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References

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2015-8056 in production — separate from our analysis above.

Notes0 Guidelines

Know something about CVE-2015-8056?

The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.

The version that genuinely resolved it — not the one the vendor claimed
A config change or rule that shut the vector down
A gotcha in the upgrade path that cost you an afternoon

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here

Verified mitigations, workarounds, and config changes
Version or environment caveats, and links to real fixes
No weaponised exploit code, or anything meant to cause harm
No spam, self-promotion, credentials, or personal data

At a glance

A fix existsUpgrade to after 19.0.0.241 or later

Severity 10.0 High

Exploit likelihood EPSS, next 30 days 5.8%

Affects: Flash Player

Remediation

A high-priority fix

Fix this in Flash Player 12 hrs · Low

Typical engagement from $2,130

Get a fix See the full breakdown ↓

A high-priority vulnerability. Send your environment and a specialist will scope CVE-2015-8056 and return a fixed quote and timeline.

You’ll deal with our team directly and deploy the reviewed fix to staging first — never straight to production.

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

Check your environment

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

Scan for this in your stack

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Practitioner notes

No notes yet

Official description

Technical summary

Affected products & versions

CVSS breakdown

Am I affected?

Remediation

References