CVE-2026-43814

System termination via kernel use-after-free

Published Jul 27, 2026 · Updated Jul 27, 2026

Kernel use-after-free in Apple iOS, iPadOS, macOS, tvOS, and watchOS before 26.6 allows local users to terminate the system via an app. The kernel retains or dereferences memory after its lifetime ends; Apple has not disclosed the affected kernel routine or the app-controlled operation that leaves the stale reference. Execution of an app on an affected device is required, and the reported consequence is unexpected system termination rather than disclosed code execution or data access.

CVSS severity9.8
Critical
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Kernel use-after-free in Apple iOS, iPadOS, macOS, tvOS, and watchOS before 26.6 allows local users to terminate the system via an app. The kernel retains or dereferences memory after its lifetime ends; Apple has not disclosed the affected kernel routine or the app-controlled operation that leaves the stale reference. Execution of an app on an affected device is required, and the reported consequence is unexpected system termination rather than disclosed code execution or data access.

The record

CVE
CVE-2026-43814
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

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=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 · tvOSversion=0 <26.6
Apple · macOSversion=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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo