CVE-2021-30845: Apple macOS

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6. A local user may be able to read kernel memory.

Affected products

• Apple macOS: from 11.0, before 11.6 (fixed in 11.6)

Published 2021-10-19. Last modified 2026-06-17.