dbcve.org
macOSOperating system · Apple

CVE-2024-40816

MEDIUM · 5.5 CVSS v3.1 Published 2024-07-29
Fix available
A fix is available. Upgrade to 12.7.6 / 13.6.8 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click

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 · unedited
An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Monterey 12.7.6, macOS Sonoma 14.6, macOS Ventura 13.6.8. A local attacker may be able to cause unexpected system shutdown.

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 confidence

This is an out-of-bounds read vulnerability in macOS that allows a local attacker to read memory beyond allocated boundaries, potentially leading to unexpected system shutdown. The vulnerability was addressed through improved input validation.

MitigationApply the appropriate macOS security update: Monterey 12.7.6, Ventura 13.6.8, or Sonoma 14.6 depending on the installed macOS version.

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
macOSOperating system
Affected:< 12.7.6>= 13.0.0, < 13.6.8>= 14.0, < 14.6

CVSS 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
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check the installed macOS version
    Open Terminal and run: sw_vers -productVersion
    Affected if The version is < 12.7.6, or >= 13.0.0 and < 13.6.8, or >= 14.0 and < 14.6
  2. Identify the macOS release name
    Run: sw_vers -productVersion and note if it starts with 12 (Monterey), 13 (Ventura), or 14 (Sonoma)
    Affected if The version falls within the affected ranges for that release

You are affected if your macOS version is any release prior to 12.7.6, any Ventura version prior to 13.6.8, or any Sonoma version prior to 14.6.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 12.7.6 / 13.6.8 / 14.6 or later
Fixed in 12.7.613.6.814.6
Interim mitigation

Apply the appropriate macOS security update: Monterey 12.7.6, Ventura 13.6.8, or Sonoma 14.6 depending on the installed macOS version.

Recommended fix High confidence

macOS Monterey 12.7.6, macOS Ventura 13.6.8, or macOS Sonoma 14.6

  1. Check current macOS version by clicking Apple menu > About This Mac
  2. Back up important data before upgrading
  3. Upgrade to macOS Monterey 12.7.6, macOS Ventura 13.6.8, or macOS Sonoma 14.6 depending on your target macOS version
  4. To upgrade: go to System Settings > General > Software Update and install available updates, or download the appropriate installer from Apple support
Caveat Standard precaution: verify critical applications are compatible with the target macOS version before production use

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in macOS Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,090
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-40816 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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