CVE-2026-43805
A race condition in Apple’s operating systems can let an app cause the system to crash or write to kernel memory. The flaw is fixed in the latest releases of iOS, iPadOS, macOS, 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, and watchOS devices – all users of these operating systems.
Real-world impact
An attacker could exploit the race condition to crash the device or corrupt kernel memory, potentially leading to a denial‑of‑service or privilege escalation that could compromise the entire system.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability has a high impact on confidentiality, integrity, and availability, can be exploited remotely without authentication, and requires no user interaction. This combination makes it a critical risk.
What to do about it
- 01Upgrade your device to the latest OS version (iOS 26.6 or later, iPadOS 26.6 or later, macOS Sequoia 15.7.8 or later, macOS Sonoma 14.8.8 or later, macOS Tahoe 26.6 or later, watchOS 26.6 or later).
- 02Restart the device if prompted.
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/128066release notesvendor advisory
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128068release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory