CVE-2023-27947
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 out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Ventura 13.3. Processing an image may result in disclosure of process 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 an out-of-bounds read vulnerability in macOS image processing that could allow disclosure of process memory. The vulnerability was addressed through improved input validation for images processed by the system. An attacker could potentially exploit this by tricking a user into processing a specially crafted image file.
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>= 13.0, < 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/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 installed macOS versionRun 'sw_vers -productVersion' in Terminal or click Apple menu > About This Mac to view the version numberAffected if The version is 13.0, 13.1, or 13.2 (versions 13.0 through 13.2 are affected; 13.3 and later are not)
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Confirm image processing usageDetermine if the system routinely processes image files using built-in macOS image handling (Preview, Safari, ImageIO framework, or any app using system image libraries)Affected if The system processes user-supplied or downloaded image files using native macOS image frameworks
You are affected if running macOS Ventura versions 13.0, 13.1, or 13.2 and the system processes image files using built-in macOS image processing capabilities.
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
Update to macOS Ventura 13.3 or later. For developers, review image processing code and ensure robust input validation is performed on image data before processing.
macOS Ventura 13.3
- Check current macOS version by clicking Apple menu > About This Mac
- Back up important data using Time Machine or another backup method before updating
- Open System Preferences (or System Settings on macOS Ventura 13+)
- Click on Software Update
- If macOS 13.3 or later is available, click Update Now or Upgrade Now to download and install the update
- Restart your Mac when prompted to complete the installation
- After restarting, verify the update by clicking Apple menu > About This Mac to confirm version 13.3 or later is installed
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-27947 — 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-2023-27947 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