CVE-2026-43799

System termination via kernel use-after-free

Published Jul 27, 2026 · Updated Jul 27, 2026

A kernel use-after-free in Apple iOS, iPadOS, macOS, tvOS, visionOS, and watchOS allows local users to terminate the system. Apple identifies the Kernel component and reuse of freed memory but has not disclosed the specific object, function, or lifetime error. Execution of an app on an affected device is required; Apple reports system termination and no additional consequence.

CVSS severity9.8
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A kernel use-after-free in Apple iOS, iPadOS, macOS, tvOS, visionOS, and watchOS allows local users to terminate the system. Apple identifies the Kernel component and reuse of freed memory but has not disclosed the specific object, function, or lifetime error. Execution of an app on an affected device is required; Apple reports system termination and no additional consequence.

The record

CVE
CVE-2026-43799
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-416, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 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 <26.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Apple · iOS and iPadOSversion=0 <26.6
Apple · visionOSversion=0 <26.6
Apple · tvOSversion=0 <26.6
Apple · macOSversion=0 <14.8.8; version=0 <15.7.8; version=0 <26.6
Apple · watchOSversion=0 <26.6

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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-416Use After Free
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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