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9.8

iOS, macOS, tvOS, watchOS: Unstable System Termination

CVE-2026-64775 · published 3 months ago
Summary

Some Apple operating systems have a memory problem that could cause a device to suddenly shut down. This is a concern because it could lead to data loss or other issues. Apple has fixed this problem in the latest versions of their operating systems, so it's essential to update to the latest version to prevent any potential issues.

What to do
  • Update apple ios and ipados to version 26.6 or later.
  • Update apple macos to version 14.8.8 or later.
  • Update apple tvos to version 26.6 or later.
  • Update apple visionos to version 26.6 or later.
  • Update apple watchos to version 26.6 or later.
Affected software
VendorProductAffected versions
apple ios and ipados < 26.6
apple macos < 14.8.8
apple tvos < 26.6
apple visionos < 26.6
apple watchos < 26.6
Original advisory text
A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, v...
A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to cause unexpected system termination.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker full control
Severity
9.8 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-665Improper Initialization
Timeline
Published27 Jul 2026
Updated4 Nov 2026
First seen27 Jul 2026
Sources
CVE-2026-64775 · NVD
CVE-2026-64775 · MITRE
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