CVE-2021-0514
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 several functions of the V8 library, there is a possible use after free due to a race condition. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-10 Android-9 Android-11 Android-8.1Android ID: A-162604069
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 confidenceA use-after-free vulnerability exists in multiple V8 JavaScript engine functions due to a race condition. The flaw allows remote code execution in an unprivileged process without any user interaction, requiring no 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= 8.1= 9.0= 10.0= 11.0CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/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.
-
Check Android OS versionGo to Settings > About Phone (or About Device) > Android version. Alternatively, run 'adb shell getprop ro.build.version.release'Affected if The Android version is exactly 8.1, 9.0, 10.0, or 11.0
-
Identify WebView providerGo to Settings > Apps > Android System WebView (or WebView). Check the package info or version field. Alternatively, run 'adb shell pm dump webview' and look for 'versionName'Affected if The WebView version corresponds to the affected Android versions (8.1, 9.0, 10.0, 11.0) and has not been patched
-
Check Chrome version on AndroidOpen Chrome app > tap three dots > Help and Feedback > About Chrome. Alternatively, run 'adb shell dumpsys package com.android.chrome' and look for versionNameAffected if Chrome version is from the same release cycle as Android 8.1, 9.0, 10.0, or 11.0 and lacks the CVE-2021-0514 patch
Your device is affected if it runs Android 8.1, 9.0, 10.0, or 11.0 and the WebView or Chrome components have not received the specific security patch for CVE-2021-0514.
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 security patches from Android's monthly security bulletin; update affected devices to the latest Android version containing the CVE-2021-0514 fix.
- Consultation6.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $14,016.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-0514 — 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-2021-0514 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