CVE-2023-42873

Kernel code execution via Pro Res bounds failure

Published Feb 21, 2024 · Updated Nov 4, 2025

Out-of-bounds write in Pro Res in Apple iOS, iPadOS, tvOS, and macOS allows local users to execute code with kernel privileges. The Pro Res component performs insufficient bounds checks, but Apple has not identified the affected function or the app-controlled input that crosses the buffer boundary. Exploitation requires an app to run locally; successful exploitation grants kernel-level code execution and full control over the affected device.

CVSS severity7.8
High
EPSS probability0.22%
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 write in Pro Res in Apple iOS, iPadOS, tvOS, and macOS allows local users to execute code with kernel privileges. The Pro Res component performs insufficient bounds checks, but Apple has not identified the affected function or the app-controlled input that crosses the buffer boundary. Exploitation requires an app to run locally; successful exploitation grants kernel-level code execution and full control over the affected device.

The record

CVE
CVE-2023-42873
Published
Feb 21, 2024
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS
Classifications
CWE-787, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 21, 2024CVE 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=0 <16.7
  2. Affected versionversion=17.0 <17.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Apple · iOSversion=0 <16.7; version=17.0 <17.1
Apple · iOS and iPadOSversion=unspecified <16.7; version=unspecified <17.1
Apple · tvOSversion=0 <17.1; version=unspecified <17.1
Apple · macOSversion=0 <12.7.1; version=13.0 <13.6.1; version=14.0 <14.1; version=unspecified <12.7; version=unspecified <13.6; version=unspecified <14.1
Apple · iPadOSversion=0 <16.7.1; version=17.0 <17.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS: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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

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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