CVE-2017-2418
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 issue was discovered in certain Apple products. macOS before 10.12.4 is affected. The issue involves the "Hypervisor" component. It allows guest OS users to obtain sensitive information from the CR8 control register via unspecified vectors.
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 an information disclosure vulnerability in Apple's Hypervisor framework for macOS. The flaw allows a guest virtual machine to read the CR8 control register (Task Priority Register), which could expose sensitive information about the host system or hypervisor state to the guest OS. CR8 is used for interrupt priority control in x86-64 architectures.
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<= 10.12.3CVSS 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
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/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 the installed macOS versionRun 'sw_vers -productVersion' in Terminal to obtain the exact macOS version numberAffected if The version is 10.12.3 or earlier (10.12.0 through 10.12.3)
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Verify if virtualization software is installedCheck for the presence of virtualization applications such as VMware, Parallels, VirtualBox, or QEMU by reviewing /Applications or running 'ls /Applications' in TerminalAffected if Any third-party virtualization software is installed on the system
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Determine if guest virtual machines are runningUse the virtualization software's management interface or CLI (e.g., 'VBoxManage list runningvms' for VirtualBox, 'vmrun list' for VMware) to list active guest VMsAffected if One or more guest virtual machines are currently running on the affected macOS host
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Confirm Hypervisor framework availabilityCheck if the Hypervisor framework is present and loadable by examining '/System/Library/Frameworks/Hypervisor.framework' or running 'kextstat | grep -i hypervisor' to list loaded kernel extensions related to virtualizationAffected if The Hypervisor framework is available on the system (present by default in affected macOS versions)
You are affected if running macOS 10.12.3 or earlier with active guest virtual machines utilizing the Hypervisor framework, as the flaw allows those guests to read the CR8 register and expose host/hypervisor state.
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 dataUpdate affected macOS systems to version 10.12.4 or later, which contains the patch for the Hypervisor component. Organizations running virtualization workloads should test that guest VMs function correctly after applying the patch.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2017-2418 — 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-2017-2418 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
- No spam, self-promotion, credentials, or personal data