A race condition was addressed with additional validation. This issue affected versions prior to iOS 11.2, macOS High Sierra 10.13.2, tvOS 11.2, watchOS 4.2, iTunes 12.7.2 for Windows, macOS High Sierra 10.13.4.
Severity
CVSS 3.0
7.0 high
CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-31)