CVE-2026-64767
A buffer overflow in the macOS kernel could let a remote attacker crash the system or corrupt memory. Apple has fixed the issue in the latest releases of Sequoia, Sonoma, and Tahoe. Users should update to those versions.
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 computer owners.
Real-world impact
An attacker could cause the computer to shut down unexpectedly or corrupt critical 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 can be exploited over the network without authentication, requires no user interaction, and fully compromises confidentiality, integrity, and availability.
What to do about it
- 011. Update macOS to the latest version (Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6).
- 022. Restart 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