CVE-2023-27934
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 memory initialization issue was addressed. This issue is fixed in macOS Ventura 13.3, macOS Monterey 12.6.4. A remote attacker may be able to cause unexpected app termination or arbitrary code execution.
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 confidenceA memory initialization vulnerability in macOS that allows a remote attacker to potentially execute arbitrary code or cause unexpected application termination. The issue stems from improper memory handling that can be exploited remotely.
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< 13.3CVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Identify installed macOS versionClick Apple menu > About This Mac to view the macOS version numberAffected if The displayed version is earlier than 13.3 (for example, 13.2.x, 13.1, 12.x, or earlier)
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Confirm macOS build dateOpen Terminal and run: sw_vers -buildVersionAffected if The build corresponds to a version predating the 13.3 security update release
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Check for pending system updatesOpen System Settings > General > Software Update; note any available updatesAffected if A security update to macOS 13.3 or later is available and not yet installed
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Review security patch statusOpen Terminal and run: defaults read /System/Library/CoreServices/Settings/systemVersion.plist 2>/dev/null || system_profiler SPSoftwareDataTypeAffected if The installed security patch level is below the March 2023 security content for CVE-2023-27934
The system is affected if the installed macOS version is earlier than 13.3 and the vendor security patches for this CVE have not been applied.
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 · scoped13.3
Apply the vendor-supplied macOS security updates (Ventura 13.3 or Monterey 12.6.4) to affected systems to remediate the vulnerability.
macOS Ventura 13.3 or macOS Monterey 12.6.4 (depending on current major version)
- Determine the current macOS version by clicking the Apple menu and selecting About This Mac
- If running macOS Ventura (13.x), upgrade to macOS Ventura 13.3 or later
- If running macOS Monterey (12.x), upgrade to macOS Monterey 12.6.4 or later
- To upgrade, go to System Settings > General > Software Update and install the available update
- Restart the system after the update completes
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation6.0 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 $3,456.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-27934 — 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-2023-27934 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