Executive brief
A vulnerability in macOS could allow a malicious application to cause the computer to crash or shut down unexpectedly. This affects several versions of the Mac operating system, potentially disrupting work and causing data loss if the system terminates while in use. Apple has released software updates to correct how the system handles memory to prevent this issue.
Technical details
An out-of-bounds read vulnerability exists in macOS due to insufficient bounds checking. A local application can exploit this flaw to read memory outside of intended buffers, leading to a denial-of-service condition via unexpected system termination. The vulnerability was addressed by implementing improved input validation and bounds checking. Affected versions include macOS Sequoia before 15.7.8, macOS Sonoma before 14.8.8, and macOS Tahoe before 26.6.
Affected products
- Apple macOS Sequoia < 15.7.8
- Apple macOS Sonoma < 14.8.8
- Apple macOS Tahoe < 26.6
Timeline
- 2026-07-27: disclosed
- 2026-07-27: patched