CVE-2025-24256
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 · uneditedThe issue was addressed with improved bounds checks. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5, macOS Ventura 13.7.5. An app may be able to disclose kernel 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 kernel memory disclosure vulnerability in macOS where insufficient bounds checking allows a local application to read kernel memory. The flaw exists in kernel-level array/buffer operations that lack proper boundary validation, potentially exposing sensitive kernel data structures.
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, < 13.7.5>= 14.0, < 14.7.5>= 15.0, < 15.4CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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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Determine installed macOS versionRun 'sw_vers -productVersion' in Terminal or check System Settings > About > macOS VersionAffected if Version is less than 13.7.5, 14.7.5, or 15.4 respectively
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Identify macOS release nameRun 'sw_vers -productVersion' and note whether it corresponds to Ventura (13.x), Sonoma (14.x), or Sequoia (15.x)Affected if Running Ventura 13.0-13.7.4, Sonoma 14.0-14.7.4, or Sequoia 15.0-15.3.x (any version below the fixed releases)
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Confirm kernel patch stateCheck Apple Security Updates by running 'defaults read /System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/AutodiskReason.plist' or review Apple security release notes for installed systemAffected if No Apple security update for CVE-2025-24256 has been applied to the system
The system is affected if it runs macOS Ventura 13.0-13.7.4, Sonoma 14.0-14.7.4, or Sequoia 15.0-15.3.x without the corresponding security patches installed.
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 · scoped13.7.514.7.515.4
Apply the Apple security updates: macOS Sequoia 15.4, macOS Sonoma 14.7.5, or macOS Ventura 13.7.5 and later. This is a critical kernel vulnerability requiring immediate patching.
macOS 13.7.5 for Ventura, macOS 14.7.5 for Sonoma, or macOS 15.4 for Sequoia
- Back up your Mac using Time Machine or another backup solution before updating
- Open System Settings (or System Preferences on older macOS versions)
- Navigate to General > Software Update
- Click 'Check for Update' or allow automatic updates to detect the new version
- Download and install the appropriate security update: macOS 13.7.5 (Ventura), macOS 14.7.5 (Sonoma), or macOS 15.4 (Sequoia)
- Restart your Mac when prompted to complete the installation
Generated from the published advisory — verify against the referenced sources before acting.
- 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-2025-24256 — 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-2025-24256 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