CVE-2026-64698
A critical memory corruption flaw in macOS can let an app crash the system or read protected kernel memory. The bug is fixed in recent macOS releases.
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 versions prior to 15.7.8, 14.8.8, and 26.6 respectively. Typical users are Mac owners running these operating systems.
Real-world impact
An attacker could cause the system to crash, leading to a denial‑of‑service, or read sensitive kernel memory, potentially exposing confidential information.
Why this severity
The CVSS score of 9.8 reflects that the flaw is network‑reachable, requires no authentication, and can compromise confidentiality, integrity, and availability, making it a critical risk.
What to do about it
- 01Upgrade macOS to the latest version: 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.
- Jul 30, 2026 · 3h agoAdvisory updatedThe NVD record was last revised.
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