CVE-2026-64695
A serious memory handling flaw in macOS can let a remote attacker crash the system or corrupt kernel memory. The issue is fixed in macOS Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. Users on older versions are at risk.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple macOS users running versions older than Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6.
Real-world impact
An attacker could force the computer to shut down unexpectedly or damage critical system memory, potentially leading to a denial‑of‑service or enabling further attacks.
Why this severity
The CVSS score of 9.8 reflects that the flaw is exploitable over the network without authentication, with no user interaction required, and it can completely compromise confidentiality, integrity, and availability.
What to do about it
- 01Upgrade macOS to at least Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6.
- 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