dbcve.org
macOSOperating system · Apple

CVE-2025-43377

MEDIUM · 5.5 CVSS v3.1 Published 2025-11-04
Fix available
A fix is available. Upgrade to 15.7.2 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 bounds checking. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, macOS Sequoia 15.7.2, macOS Tahoe 26.1. An app may be able to cause a denial-of-service.

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 confidence

This vulnerability is an out-of-bounds read flaw in Apple operating systems that was addressed with improved bounds checking. The vulnerability could allow a malicious application to trigger a denial-of-service condition by reading memory outside allocated buffers. The issue affects iOS 18.7.2 and earlier, iPadOS 18.7.2 and earlier, macOS Sequoia 15.7.2 and earlier, and macOS Tahoe 26.1 and earlier.

MitigationApply the vendor-supplied security updates: iOS 18.7.2, iPadOS 18.7.2, macOS Sequoia 15.7.2, or macOS Tahoe 26.1 or later. For enterprise environments, deploy updates via MDM or software distribution mechanisms.

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:< 15.7.2

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 iOS version
    Go to Settings > General > About on the iPhone, or use Finder/iTunes to check the iOS version. Alternatively, check the version via Xcode or MDM if managed.
    Affected if The iOS version is 18.7.2 or earlier (v18.7.2, 18.7.1, 18.6.x, etc.) and the device has not been updated to iOS 18.7.3 or later.
  2. Check the installed iPadOS version
    Go to Settings > General > About on the iPad, or use Finder/iTunes to check the iPadOS version. Alternatively, check the version via Xcode or MDM if managed.
    Affected if The iPadOS version is 18.7.2 or earlier (v18.7.2, 18.7.1, 18.6.x, etc.) and the device has not been updated to iPadOS 18.7.3 or later.
  3. Check the installed macOS Sequoia version
    Click the Apple menu > About This Mac > Overview tab. The version number appears below the macOS name. Alternatively, run `sw_vers` in Terminal.
    Affected if The macOS Sequoia version is 15.7.2 or earlier (such as 15.7.2, 15.7.1, 15.6.x, etc.) and the system has not been updated to macOS Sequoia 15.7.3 or later.
  4. Check the installed macOS Tahoe version
    Click the Apple menu > About This Mac > Overview tab. The version number appears below the macOS name. Alternatively, run `sw_vers` in Terminal.
    Affected if The macOS Tahoe version is 26.1 or earlier (such as 26.1, 26.0.x, 25.x, etc.) and the system has not been updated to macOS Tahoe 26.2 or later.

The environment is affected if any iOS, iPadOS, macOS Sequoia, or macOS Tahoe device or computer is running a version at or below the vulnerable release for that product line, and the specific out-of-bounds read condition can be triggered by a malicious application on that device.

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 15.7.2 or later
Fixed in 15.7.2
Interim mitigation

Apply the vendor-supplied security updates: iOS 18.7.2, iPadOS 18.7.2, macOS Sequoia 15.7.2, or macOS Tahoe 26.1 or later. For enterprise environments, deploy updates via MDM or software distribution mechanisms.

Recommended fix High confidence

macOS Sequoia 15.7.2

  1. Back up your Mac using Time Machine or another backup solution before applying system updates
  2. Go to System Settings > General > Software Update
  3. Check for available updates - the system should show macOS Sequoia 15.7.2 or later
  4. Click Download and Install to apply the security update
  5. Restart your Mac when prompted to complete the installation

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

Fix this in macOS Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2025-43377 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