CVE-2026-43682
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 should update to these or newer releases.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
macOS users running Sequoia, Sonoma, or Tahoe versions older than 15.7.8, 14.8.8, or 26.6 respectively.
Real-world impact
An attacker could force the computer to shut down unexpectedly or corrupt 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 can be exploited remotely without authentication, and it compromises confidentiality, integrity, and availability of the entire system.
What to do about it
- 011. Update macOS to at least Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. 2. 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