Executive brief
A security vulnerability in macOS could allow a malicious application to cause the computer to crash or shut down unexpectedly. This issue affects several versions of the Mac operating system, including Sequoia, Sonoma, and Tahoe. Users should update their devices to the latest software versions to prevent potential service disruptions.
Technical details
An integer overflow vulnerability exists in macOS that can be triggered by a malicious application. The flaw is rooted in insufficient input validation, which can lead to unexpected system termination (denial of service). The vulnerability affects macOS Sequoia versions prior to 15.7.8, macOS Sonoma versions prior to 14.8.8, and macOS Tahoe versions prior to 26.6. Apple has addressed the issue by improving input validation in the affected components. Exploitation requires a malicious app to be running on the target system.
Affected products
- Apple macOS Sequoia Before 15.7.8
- Apple macOS Sonoma Before 14.8.8
- Apple macOS Tahoe Before 26.6
Timeline
- 2026-07-27: advisory
- 2026-07-27: disclosed
- 2026-07-27: patched