CVE-2026-43773: Apple macOS

Critical severity, CVSS 9.8. EPSS: 0.6% 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 Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

Affected products

• Apple macOS: from 14.0, before 14.8.8 (fixed in 14.8.8); from 15.0, before 15.7.8 (fixed in 15.7.8); from 26.0, before 26.6 (fixed in 26.6)

Published 2026-07-27. Last modified 2026-07-28.