CVE-2023-42886

Code execution via CoreServices out-of-bounds read

Published Dec 12, 2023 · Updated Nov 4, 2025

Out-of-bounds read in Apple macOS CoreServices allows local users to crash an app or execute arbitrary code with user privileges. Within CoreServices, an operation reads past a buffer boundary because affected releases lack the corrected bounds checks; Apple has not identified the input path. Local user access is required; affected branches are Monterey before 12.7.2, Ventura before 13.6.3, and Sonoma before 14.2.

CVSS severity7.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Apple macOS CoreServices allows local users to crash an app or execute arbitrary code with user privileges. Within CoreServices, an operation reads past a buffer boundary because affected releases lack the corrected bounds checks; Apple has not identified the input path. Local user access is required; affected branches are Monterey before 12.7.2, Ventura before 13.6.3, and Sonoma before 14.2.

The record

CVE
CVE-2023-42886
Published
Dec 12, 2023
Updated
Nov 4, 2025
Vendor
Apple
Product
macOS
Classifications
CWE-125, CAPEC-540, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 12, 2023CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <12.7
  2. Affected versionversion=unspecified <13.6
  3. Affected versionversion=unspecified <14.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=unspecified <12.7; version=unspecified <13.6; version=unspecified <14.2

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1203Exploitation for Client Execution

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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