Executive brief
A vulnerability in Apple's operating systems could allow a malicious application to cause a sudden system crash or shutdown. This affects iPhones, iPads, Macs, and other Apple devices. While the issue primarily impacts system stability, it could disrupt operations or lead to temporary service unavailability on the affected device.
Technical details
An out-of-bounds read vulnerability exists in Apple's iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The flaw is caused by insufficient bounds checking when processing certain data. A locally installed malicious application can exploit this vulnerability to trigger an unexpected system termination (denial of service). Apple has addressed the issue by improving bounds checking in the 26.6 updates for all affected platforms.
Affected products
- Apple iOS and iPadOS < 26.6
- Apple macOS Tahoe < 26.6
- Apple tvOS < 26.6
- Apple visionOS < 26.6
- Apple watchOS < 26.6
Timeline
- 2026-07-27: disclosed
- 2026-07-27: patched