CVE-2021-30714
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 · uneditedA race condition was addressed with improved state handling. This issue is fixed in iOS 14.6 and iPadOS 14.6. An application may be able to cause unexpected system termination or write kernel memory.
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 · moderate confidenceThis is a race condition vulnerability in the iOS/iPadOS kernel where improper state handling allows a local malicious application to either cause unexpected system termination (denial of service) or write to kernel memory (privilege escalation). The fix involves improved state handling to prevent the race condition from being exploitable.
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< 14.6< 14.6CVSS 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
- Local
- Complexity
- High
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/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 iOS versionGo to Settings > General > About > Version on the device and note the displayed version number (e.g., 14.5, 14.5.1)Affected if The version is below 14.6 (such as 14.5.x or earlier)
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Check iPadOS version if applicableIf using an iPad, go to Settings > General > About > Version and note the displayed version numberAffected if The iPadOS version is below 14.6 (such as 14.5.x or earlier)
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Verify no kernel modification detectionOn a non-jailbroken device, confirm the device has not been modified to bypass security restrictions. There is no user-accessible command for this; physical inspection and trust that apps are only installed from the App Store is assumed.Affected if The device is jailbroken, which could indicate the kernel integrity is already compromised
A user is affected if their iOS or iPadOS device runs a version lower than 14.6, as this kernel race condition can be exploited by a local malicious application for denial of service or privilege escalation.
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 · scoped14.6
Apply iOS 14.6 or iPadOS 14.6 (or later) to vulnerable devices. As this is a local privilege escalation, ensure devices are not jailbroken and restrict installation of apps from untrusted sources.
iOS 14.6 and iPadOS 14.6
- Ensure device is backed up before updating
- Go to Settings > General > Software Update on the iPhone or iPad
- Download and install iOS 14.6 (for iPhone) or iPadOS 14.6 (for iPad)
- After installation, verify the update was successful by checking Settings > General > About > iOS Version shows 14.6 or later
Generated from the published advisory — verify against the referenced sources before acting.
- 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-2021-30714 — 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-2021-30714 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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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