CVE-2026-64696
A critical memory handling flaw in macOS can let a remote attacker crash the system or corrupt kernel memory. The vulnerability is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users on earlier 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 prior to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6.
Real-world impact
An attacker could remotely trigger a system crash or corrupt kernel memory, potentially leading to denial of service or privilege escalation.
Why this severity
The CVSS score of 9.8 reflects that the flaw is exploitable over the network with no authentication, no user interaction, and can fully compromise confidentiality, integrity, and availability.
What to do about it
- 011. Update macOS to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6, or a later version that includes the fix.
- 022. After the update, restart the computer to ensure the new kernel is loaded.
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