CVE-2019-2208
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.
NVD · uneditedIn PromiseBuiltinsAssembler::NewPromiseCapability of builtins-promise.cc, there is a possible out of bounds read in v8 JIT code due to a bug in code generation. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android-8.1, Android-9 Android ID: A-138441919
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.
dbcve analysis · high confidenceThis is an out-of-bounds read vulnerability in the V8 JavaScript engine's JIT code generation for Promise capabilities. The bug in PromiseBuiltinsAssembler::NewPromiseCapability in builtins-promise.cc allows remote information disclosure by reading memory beyond allocated bounds, without requiring any user interaction or additional execution privileges.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
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.
NVD · CPE data= 9.0CVSS 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.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify Android OS versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The version is exactly 9.0 (Android 9 Pie) - other versions are not affected by this specific CVE
-
Confirm V8 engine usageDetermine if the target application uses WebView or contains an embedded Chromium-based browser. Check app manifest for android.webkit.WebView usage or inspect the application's bundled libraries for libchromium.so or similar V8-related binariesAffected if The application uses WebView or any Chromium-based component that includes the V8 JavaScript engine
-
Check for Chrome/WebView component versionsFor Chrome: Navigate to chrome://version in the Chrome app. For WebView: Navigate to chrome://inspect/#devices in desktop Chrome with the device connected, or check the WebView implementation in Settings > Apps > Android System WebView (on Android 9.0 this typically shows version 74.x-76.x range)Affected if The WebView or Chrome version is from the affected Android 9.0 release (typically unpatched versions from mid-2019)
-
Verify security patch levelCheck Settings > About Phone > Security patch level, or run 'getprop ro.build.version.security_patch' via ADBAffected if The Security Patch Level is earlier than September 2019 (the patch A-138441919 was included in Android 9.0 security updates starting September 2019)
A device or application is affected if running Android 9.0 with an unpatched WebView/Chrome component predating the September 2019 security update.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataApply the Android security patch for the A-138441919 vulnerability (included in Android 8.1 and 9 security updates). For applications using WebView, ensure users are on patched Android versions or consider restricting access to sensitive data until devices are updated.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-2208 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-2208 in production — separate from our analysis above.
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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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