CVE-2020-9849
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 · uneditedAn information disclosure issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, iOS 14.0 and iPadOS 14.0, iTunes for Windows 12.10.9, iCloud for Windows 11.5, tvOS 14.0. A remote attacker may be able to leak 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 · high confidenceA memory information disclosure vulnerability in Apple's operating systems (macOS, iOS, iPadOS, watchOS, tvOS) and iTunes/iCloud for Windows that allows a remote attacker to leak memory contents. The issue was addressed with improved state management.
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< 11.5>= 12.0.0, < 12.10.9< 14.0< 11.0.1< 14.0< 7.0CVSS 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
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.
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Check macOS versionOpen System Preferences > About This Mac, or run `sw_vers -productVersion` in TerminalAffected if Version is below 11.0.1
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Check iOS or iPadOS versionGo to Settings > General > About on the device and note the version numberAffected if Version is below 14.0
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Check watchOS versionOpen the Watch app on paired iPhone, go to My Watch > General > AboutAffected if Version is below 7.0
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Check tvOS versionGo to Settings > General > About > Version on Apple TVAffected if Version is below 14.0
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Check iTunes for Windows versionOpen iTunes > Help > About iTunes, or view installed version in Programs and FeaturesAffected if Version is 12.0.0 or higher but below 12.10.9
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Check iCloud for Windows versionOpen iCloud app > Help > About iCloud, or view in Programs and FeaturesAffected if Version is below 11.5
If any of the installed product versions fall within the affected ranges listed, the environment is vulnerable to the memory disclosure flaw.
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 data7.011.0.111.5
Apply the vendor-supplied patches by updating to macOS Big Sur 11.0.1 or later, iOS/iPadOS 14.0 or later, watchOS 7.0 or later, tvOS 14.0 or later, iTunes for Windows 12.10.9 or later, or iCloud for Windows 11.5 or later.
- Consultation1.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-9849 — 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-2020-9849 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