Executive brief
A security vulnerability in Apple macOS and tvOS could allow a malicious application to crash the operating system. This issue affects the stability of the device and could lead to unexpected system shutdowns, potentially causing data loss or service interruptions. Users should update their devices to the latest software versions to resolve this issue.
Technical details
A type confusion vulnerability exists in macOS and tvOS due to improper memory handling. A local malicious application can exploit this flaw to trigger an unexpected system termination (denial of service). The issue was mitigated by improving memory management logic within the affected operating systems. The vulnerability is fixed in macOS Tahoe 26.6 and tvOS 26.6. No authentication bypass or remote code execution was reported in the advisory.
Affected products
- Apple macOS Tahoe before 26.6
- Apple tvOS before 26.6
Timeline
- 2026-07-27: advisory
- 2026-07-27: patched