CVE-2018-4394: Input Validation

Published Oct 30, 2018
·
Updated

ICU. A memory corruption issue was addressed with improved input validation.

Other sources

A memory corruption issue was addressed with improved input validation. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1.

Credit

Erik Verbruggen(The Qt Company), Erik Verbruggen(The Qt Company), Erik Verbruggen(The Qt Company), Erik Verbruggen(The Qt Company), Erik Verbruggen(The Qt Company)

Affected Software

13 affected componentsFixes available
Apple tvOS<12.1
12.1
Apple macOS Mojave<10.14.1
10.14.1
Apple High Sierra
Apple Sierra
Apple WatchOS<5.1
5.1
Apple iTunes for Windows<12.9.1
12.9.1
Apple iOS<12.1
12.1
Apple iPhone OS<12.1
Apple iOS and macOS<10.14.1
Apple tvOS<12.1
Apple WatchOS<5.1
Apple iTunes<12.9.1
Microsoft Windows

Event History

Apr 3, 2019
CVE Published
via MITRE·05:43 PM
Data Sourced
via MITRE·05:43 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is CVE-2018-4394?

CVE-2018-4394 is a memory corruption vulnerability in ICU that was fixed with improved input validation.

2

Which versions are affected by CVE-2018-4394?

Versions prior to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, iTunes 12.9.1 are affected by CVE-2018-4394.

3

How severe is CVE-2018-4394?

CVE-2018-4394 has a severity rating of 7.8 (high).

4

How do I fix CVE-2018-4394?

To fix CVE-2018-4394, update to iOS 12.1, macOS Mojave 10.14.1, tvOS 12.1, watchOS 5.1, or iTunes 12.9.1, depending on the affected software.

5

Where can I find more information about CVE-2018-4394?

You can find more information about CVE-2018-4394 on the Apple support page: [link](https://support.apple.com/en-us/HT209193).

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203