CVE-2018-4363

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-04-03 · updated 2026-06-17
Weakness: CWE-20

Description

An input validation issue existed in the kernel. This issue was addressed with improved input validation. This issue affected versions prior to iOS 12, tvOS 12, watchOS 5.

Affected products

Apple Iphone Os: before 12.0 — fixed in 12.0
Apple tvOS: before 12 — fixed in 12
Apple watchOS: before 5.0 — fixed in 5.0

How to fix

Upgrade to a fixed version: Apple Iphone Os 12.0; Apple tvOS 12; Apple watchOS 5.0. Check the vendor advisory for mitigations.

References

https://support.apple.com/kb/HT209106
https://support.apple.com/kb/HT209107
https://support.apple.com/kb/HT209108
https://support.apple.com/kb/HT209106
https://support.apple.com/kb/HT209107
https://support.apple.com/kb/HT209108

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