CVE-2026-64729
A critical flaw in Apple’s operating systems allows a program to free memory and then use it again, causing the system to crash. The issue is fixed in version 26.6 of iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple devices running iOS, iPadOS, macOS Tahoe, tvOS, visionOS, or watchOS before version 26.6.
Real-world impact
An attacker could trigger a crash that terminates the operating system, leading to a denial of service for the user.
Why this severity
The CVSS score of 9.8 reflects that the flaw can be exploited remotely with no authentication or user interaction, and it can completely compromise confidentiality, integrity, and availability.
What to do about it
- 01Upgrade your device to iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6 or later.
NVD-referenced vendor advisory
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.
How it’s attacked
References & advisories
- support.apple.com/en-us/128066release notesvendor advisory
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128068release notesvendor advisory
- support.apple.com/en-us/128069release notesvendor advisory
- support.apple.com/en-us/128070release notesvendor advisory