CVE-2026-64774
This vulnerability is an integer overflow in Apple operating systems that could let a remote attacker crash applications or corrupt memory. It was fixed in recent OS releases. Users should update to the latest version.
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, tvOS, or visionOS versions older than iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6.
Real-world impact
An attacker could trigger crashes or corrupt memory, potentially leading to denial of service or arbitrary code execution on the affected device.
Why this severity
The CVSS score is 9.8 because the flaw can be exploited remotely without authentication and can completely compromise confidentiality, integrity, and availability.
What to do about it
- 01Upgrade iOS to version 26.6 or later.
- 02Upgrade iPadOS to version 26.6 or later.
- 03Upgrade macOS to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6 or later.
- 04Upgrade tvOS to version 26.6 or later.
- 05Upgrade visionOS to version 26.6 or later.
- 06Restart the 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/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