CVE-2026-64694

System crash via Disk Images integer overflow

Published Jul 27, 2026 · Updated Jul 27, 2026

Integer overflow in Apple macOS Disk Images allows attackers to cause unexpected system termination through a local app. Apple identifies improved input validation in Disk Images but does not disclose the overflowing operation or attacker-controlled value. An app must reach the affected path on Sonoma before 14.8.8, Sequoia before 15.7.8, or Tahoe before 26.6; the reported effect is a system crash.

CVSS severity9.8
Critical
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Apple macOS Disk Images allows attackers to cause unexpected system termination through a local app. Apple identifies improved input validation in Disk Images but does not disclose the overflowing operation or attacker-controlled value. An app must reach the affected path on Sonoma before 14.8.8, Sequoia before 15.7.8, or Tahoe before 26.6; the reported effect is a system crash.

The record

CVE
CVE-2026-64694
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
macOS
Classifications
CWE-190, 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 <14.8.8
  2. Affected versionversion=0 <15.7.8
  3. Affected versionversion=0 <26.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

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 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-190Integer Overflow or Wraparound
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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