CVE-2025-43478

Local system crash via ASP TCP use-after-free

Published Nov 4, 2025 · Updated Nov 4, 2025

Use-after-free in ASP TCP in affected Apple macOS releases allows local users to cause a system crash by running a crafted app. Apple identifies access to freed memory in ASP TCP but has not disclosed the affected object, lifetime error, or code path. Execution of a local app is required; the reported consequence is availability loss through unexpected system termination, with no reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in ASP TCP in affected Apple macOS releases allows local users to cause a system crash by running a crafted app. Apple identifies access to freed memory in ASP TCP but has not disclosed the affected object, lifetime error, or code path. Execution of a local app is required; the reported consequence is availability loss through unexpected system termination, with no reported data disclosure or modification.

The record

CVE
CVE-2025-43478
Published
Nov 4, 2025
Updated
Nov 4, 2025
Vendor
Apple
Product
macOS
Classifications
CWE-416, 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 <14.8
  2. Affected versionversion=unspecified <15.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=unspecified <14.8; version=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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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