CVE-2026-43724

Kernel memory write via unsanitized app input

Published Jun 29, 2026 · Updated Jun 29, 2026

Improper input validation in iOS, iPadOS, and macOS before 26.5.2 allows local users to crash the system or write kernel memory. Apple identifies the Kernel component and says it inadequately sanitizes app-supplied input, but has not disclosed the affected interface or operation. Exploitation requires a locally running app; successful input can terminate the operating system or alter privileged kernel memory.

CVSS severity7.8
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in iOS, iPadOS, and macOS before 26.5.2 allows local users to crash the system or write kernel memory. Apple identifies the Kernel component and says it inadequately sanitizes app-supplied input, but has not disclosed the affected interface or operation. Exploitation requires a locally running app; successful input can terminate the operating system or alter privileged kernel memory.

The record

CVE
CVE-2026-43724
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-20, T1499.004, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 2026Record 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 <26.5.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <26.5.2
Apple · macOSversion=0 <26.5.2

Published CVSS scores

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation
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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