CVE-2026-43686Network attack vector

Kernel memory corruption via NFS use-after-free

Published Sep 14, 2026 · Updated Sep 14, 2026

Kernel use-after-free in affected Apple operating-system releases allows attackers to corrupt kernel memory through a malicious NFS server. The kernel NFS client accesses an object after its lifetime ends while establishing the server connection; Apple has not disclosed the responsible function or object. The device must connect to an attacker-controlled NFS server, and the published consequence is kernel memory corruption rather than a confirmed crash or code-execution outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Kernel use-after-free in affected Apple operating-system releases allows attackers to corrupt kernel memory through a malicious NFS server. The kernel NFS client accesses an object after its lifetime ends while establishing the server connection; Apple has not disclosed the responsible function or object. The device must connect to an attacker-controlled NFS server, and the published consequence is kernel memory corruption rather than a confirmed crash or code-execution outcome.

The record

CVE
CVE-2026-43686
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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 <26.7
  2. Affected versionversion=0 <27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <26.7; version=0 <27
Apple · visionOSversion=0 <27
Apple · tvOSversion=0 <27
Apple · macOSversion=0 <15.8; version=0 <26.7; version=0 <27
Apple · watchOSversion=0 <27

Published CVSS scores

No CVSS assessment is available in this record.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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