CVE-2026-64704Network attack vector

System crash via mismatched SMB create context

Published Jul 27, 2026 · Updated Jul 27, 2026

Type confusion in Apple macOS SMB before 14.8.8, 15.7.8, or 26.6 allows remote attackers controlling an SMB server to crash the system. smb2_smb_parse_create_contexts trusts a reply's RqLs tag and reinterprets a Resolve ID object as a lease wrapper, dereferencing its file ID as a pointer. The Mac must mount the server, which must advertise AAPL Resolve ID and file-ID support, before an app triggers inode resolution through fsgetpath.

CVSS severity9.8
Critical
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Apple macOS SMB before 14.8.8, 15.7.8, or 26.6 allows remote attackers controlling an SMB server to crash the system. smb2_smb_parse_create_contexts trusts a reply's RqLs tag and reinterprets a Resolve ID object as a lease wrapper, dereferencing its file ID as a pointer. The Mac must mount the server, which must advertise AAPL Resolve ID and file-ID support, before an app triggers inode resolution through fsgetpath.

The record

CVE
CVE-2026-64704
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-843, T1499
Attack vector
network
Privileges
unauthenticated

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 <14.8.8
  2. Affected versionversion=0 <15.7.8
  3. Affected versionversion=0 <26.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=0 <14.8.8; version=0 <15.7.8; version=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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
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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