CVE-2026-64703
A critical vulnerability in macOS allows a use‑after‑free error that can crash the system. The flaw was fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users running 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
Mac computers running macOS Sequoia, Sonoma, or Tahoe versions prior to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. Typical users include everyday Mac owners and IT administrators managing Apple devices.
Real-world impact
An attacker could trigger a denial‑of‑service by causing the operating system to crash, potentially disrupting services and requiring a reboot.
Why this severity
The CVSS score of 9.8 reflects the vulnerability’s high impact (complete loss of confidentiality, integrity, and availability) combined with no authentication or user interaction needed, making it extremely dangerous for any user of the affected macOS versions.
What to do about it
- 01Upgrade your Mac to macOS Sequoia 15.7.8 or later.
- 02Upgrade your Mac to macOS Sonoma 14.8.8 or later.
- 03Upgrade your Mac to macOS Tahoe 26.6 or later.
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