Critical· 9.8official fix available
CVE-2026-64704
A type confusion bug in macOS can cause the system to crash unexpectedly. The issue is fixed in the latest releases of macOS Sequoia, Sonoma, and Tahoe.
publishedJul 27, 2026
last modifiedJul 28, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
36th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 27, 2026
An official fix is available, so this entry is kept for 30 days and then removed automatically.
01
Who is affected
macOS users running versions older than Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6.
02
Real-world impact
An attacker who can reach the system over the network could trigger a crash, leading to a denial of service and potential loss of data.
03
Why this severity
The CVSS score of 9.8 reflects that the flaw can be exploited remotely without authentication, and it gives an attacker full control over the system’s stability, causing complete loss of confidentiality, integrity, and availability.
04
What to do about it
official fix available
recommended steps
- 01Upgrade macOS to Sequoia 15.7.8 or later, or Sonoma 14.8.8 or later, or Tahoe 26.6 or later.
- 02Restart the computer to complete the update.
NVD-referenced vendor advisory
05
Timeline
- Jul 27, 2026 · 3d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 28, 2026 · 2d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
06
How it’s attacked
Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07
References & advisories
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →