CVE-2026-64697
A memory handling flaw in macOS can let a malicious app crash the system or corrupt kernel memory. The issue is fixed in the latest releases of Sequoia, Sonoma, and Tahoe. Users should update to the patched versions to avoid the risk.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
macOS Sequoia, Sonoma, and Tahoe users running versions older than 15.7.8, 14.8.8, and 26.6 respectively. Typical users are Mac owners who have not applied the latest OS updates.
Real-world impact
An attacker could cause the Mac to shut down unexpectedly or corrupt critical system memory, which could lead to a denial‑of‑service or potentially allow further compromise.
Why this severity
The CVSS score of 9.8 reflects that the flaw allows complete loss of confidentiality, integrity, and availability without any authentication or user interaction.
What to do about it
- 01Update macOS to Sequoia 15.7.8 or later, Sonoma 14.8.8 or later, or Tahoe 26.6 or later.
- 02Restart the computer to complete 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/128067release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory