A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 11.2, watchOS 4.2. An application may be able to execute arbitrary code with kernel privilege.
Severity
CVSS 3.1
7.8 high
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
0.9% chance of exploitation in the next 30 days; higher than 60% of CVEs (scores of 2026-10-31)