CVE-2019-2046
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 CalculateInstanceSizeForDerivedClass of objects.cc, there is possible memory corruption due to an integer overflow. This could lead to remote code execution in the proxy auto-config with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android-7.0 Android-7.1.1 Android-7.1.2 Android-8.0 Android-8.1 Android-9 Android ID: A-117556220
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 confidenceInteger overflow in CalculateInstanceSizeForDerivedClass in objects.cc allows memory corruption leading to remote code execution in Android's proxy auto-config feature without requiring user interaction or additional 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= 7.0= 7.1.1= 7.1.2= 8.0= 8.1= 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
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
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Check Android OS versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The version is 7.0, 7.1.1, 7.1.2, 8.0, 8.1, or 9.0
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Confirm proxy auto-config is in useCheck WiFi network settings for a PAC file URL or proxy configuration; on Android this is typically under Settings > Network & Internet > WiFi > advanced > ProxyAffected if A manual proxy or PAC (Proxy Auto-Config) setting is configured and active on the device
A device is affected if it runs Android 7.0 through 9.0 and has proxy auto-config enabled, as the integer overflow in CalculateInstanceSizeForDerivedClass triggers only when the PAC feature processes a specially crafted configuration.
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.
dbcve · scopedApply Android system security patches from the monthly bulletin; this framework-level vulnerability requires updating the Android OS through manufacturer or Google-provided system updates as no application-level workaround exists.
Android 10 or later (or March 2019 security patch level for Android 7.0-9)
- 1. Check the current Android version on the device by going to Settings > About Phone > Android version
- 2. If the device is running Android 7.0, 7.1.1, 7.1.2, 8.0, 8.1, or 9, check if a system update is available via Settings > System > Advanced > System update > Check for updates
- 3. Download and install the latest available system update. The fix for CVE-2019-2046 was released in the March 2019 Android Security Patch Level
- 4. After updating, verify the Android version and patch level in Settings > About Phone > Build number (should show March 2019 or later security patch)
- 5. If the device manufacturer no longer provides updates for these Android versions, consider upgrading to a device that supports Android 10 or later
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-2046 — 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-2019-2046 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
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- 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
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