CVE-2026-64775
A critical memory initialization flaw in Apple’s operating systems can let an app cause the system to crash. The issue is fixed in recent OS releases. Users should update to the latest version to protect their devices.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple iOS, iPadOS, macOS (Sequoia, Sonoma, Tahoe), tvOS, visionOS, and watchOS devices running versions before the specified updates. Typical users include iPhone, iPad, Mac, Apple TV, Apple Watch, and Vision Pro owners.
Real-world impact
An attacker could cause a device to terminate unexpectedly, disrupting normal use and potentially enabling denial‑of‑service attacks.
Why this severity
The CVSS score of 9.8 reflects that the flaw can be exploited remotely without authentication, and it can compromise confidentiality, integrity, and availability of the affected device.
What to do about it
- 01Upgrade your device to the latest OS version (iOS 26.6 or later, iPadOS 26.6 or later, macOS Sequoia 15.7.8 or later, macOS Sonoma 14.8.8 or later, macOS Tahoe 26.6 or later, tvOS 26.6 or later, visionOS 26.6 or later, watchOS 26.6 or later).
- 02Restart your device after the update.
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
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory