CVE-2018-4378

Name: CVE-2018-4378
Creator: NVD / NIST
Published: 2019-04-03T18:29:11.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.46%

Last modified Jun 17, 2026

CVE-2018-4378 is a vulnerability of currently unknown severity. A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

Metrics

EPSS Probability

1.46%

70.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Apple	Safari	< 12.0.1
Apple	Iphone Os	< 12.1
Apple	Tvos	< 12.1
Apple	Watchos	< 5.1
Apple	Icloud	< 7.8
Apple	Itunes	< 12.9.1

References

https://support.apple.com/kb/HT209192Vendor Advisory
https://support.apple.com/kb/HT209194Vendor Advisory
https://support.apple.com/kb/HT209195Vendor Advisory
https://support.apple.com/kb/HT209196Vendor Advisory
https://support.apple.com/kb/HT209197Vendor Advisory
https://support.apple.com/kb/HT209198Vendor Advisory
https://support.apple.com/kb/HT209192Vendor Advisory
https://support.apple.com/kb/HT209194Vendor Advisory
https://support.apple.com/kb/HT209195Vendor Advisory
https://support.apple.com/kb/HT209196Vendor Advisory
https://support.apple.com/kb/HT209197Vendor Advisory
https://support.apple.com/kb/HT209198Vendor Advisory

Timeline

Published: Apr 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4378?

A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12.1, tvOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

How severe is CVE-2018-4378?

Severity scoring for CVE-2018-4378 is pending analysis. The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4378?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4378?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST