CVE-2026-43694
A critical memory handling flaw in macOS can let an attacker crash the system or corrupt kernel memory. The issue is fixed in newer releases of macOS Sequoia, Sonoma, and Tahoe. Users should update to the latest OS version to protect their computers.
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 versions older than 15.7.8, 14.8.8, and 26.6 respectively.
Real-world impact
An attacker could cause the computer to shut down unexpectedly or overwrite protected memory, potentially allowing them to run arbitrary code with kernel privileges.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability is network‑reachable, requires no user interaction, and gives an attacker full control over the system, including the ability to crash or hijack it.
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