CVE-2025-43377

Application-triggered denial of service via out-of-bounds read

Published Nov 4, 2025 · Updated Nov 4, 2025

An out-of-bounds read in Apple macOS Model I/O allows local users to cause a denial-of-service by running an app locally. Apple has not disclosed the affected Model I/O function, the input that reaches it, or the bounds check that was missing. Affected releases include macOS Sequoia before 15.7.2 and macOS Tahoe before 26.1; the documented consequence is service interruption.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in Apple macOS Model I/O allows local users to cause a denial-of-service by running an app locally. Apple has not disclosed the affected Model I/O function, the input that reaches it, or the bounds check that was missing. Affected releases include macOS Sequoia before 15.7.2 and macOS Tahoe before 26.1; the documented consequence is service interruption.

The record

CVE
CVE-2025-43377
Published
Nov 4, 2025
Updated
Nov 4, 2025
Vendor
Apple
Product
macOS
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <15.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=unspecified <15.7

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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