CVE-2023-32420

Kernel-memory disclosure or system crash via out-of-bounds read

Published Jun 23, 2023 · Updated Dec 4, 2024

Out-of-bounds read in Apple IOSurfaceAccelerator allows local users to crash iOS, iPadOS, macOS, tvOS, or watchOS or read kernel memory. IOSurfaceAccelerator insufficiently validates app-supplied input and consequently reads beyond valid buffer bounds; Apple has not disclosed the affected function or input structure. Execution of an app is required, and the documented consequences are limited to kernel-memory disclosure or unexpected system termination.

CVSS severity7.1
High
EPSS probability0.25%
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 IOSurfaceAccelerator allows local users to crash iOS, iPadOS, macOS, tvOS, or watchOS or read kernel memory. IOSurfaceAccelerator insufficiently validates app-supplied input and consequently reads beyond valid buffer bounds; Apple has not disclosed the affected function or input structure. Execution of an app is required, and the documented consequences are limited to kernel-memory disclosure or unexpected system termination.

The record

CVE
CVE-2023-32420
Published
Jun 23, 2023
Updated
Dec 4, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-125, T1005, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2024Record 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 <16.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.5
Apple · tvOSversion=unspecified <16.5
Apple · macOSversion=unspecified <13.4
Apple · watchOSversion=unspecified <9.5

Published CVSS scores

7.1NISTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1005Data from Local System
T1499Endpoint Denial of Service

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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