CVE-2026-39868
A flaw in Apple’s operating systems allows attackers to crash the system or corrupt kernel memory. The issue is fixed in the latest releases of iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Users should update to the newest OS version to protect their devices.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple iOS, iPadOS, macOS, tvOS, visionOS, and watchOS devices running versions older than iOS 26.5.2, iPadOS 26.5.2, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, or watchOS 26.6.
Real-world impact
An attacker could force the device to shut down unexpectedly or corrupt critical system memory, leading to denial of service or potential privilege escalation.
Why this severity
The CVSS score of 9.1 reflects that the vulnerability can be exploited over the network with low effort, requires no user interaction, and has a high impact on system availability and integrity.
What to do about it
- 01Update your device to the latest OS version (iOS 26.5.2 or later, iPadOS 26.5.2 or later, macOS Sequoia 15.7.8 or later, macOS Sonoma 14.8.8 or later, macOS Tahoe 26.5.2 or later, tvOS 26.6 or later, visionOS 26.6 or later, watchOS 26.6 or later).
- 02Restart the device if prompted.
NVD-referenced vendor advisory
Timeline
- Jun 29, 2026 · Jun 29, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 27, 2026 · 7d agoAdvisory updatedThe NVD record was last revised.
- Jul 27, 2026 · 7d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.