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Fencer Intel
high 8.8

CVE-2018-4378 json

A memory corruption issue was addressed with improved validation.

published 2019-04-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16164

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

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.

Patch / fix

  • apple safari 12.0.1
  • apple icloud 7.8
  • apple itunes 12.9.1
  • apple iphone_os 12.1
  • apple tvos 12.1
  • apple watchos 5.1
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.22.1-1

debian advisories DEBIAN-CVE-2018-4378

  • webkit2gtk3 SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 2.22.5-3.13.1
  • webkit2gtk3 SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES for SAP 12 SP2 +12 more 2.22.4-2.29.3

suse advisories SUSE-SU-2019:0092-1SUSE-SU-2019:0059-1

  • webkit2gtk3 openSUSE Leap 15.0 2.22.5-lp150.2.9.1

opensuse advisories openSUSE-SU-2019:0081-1

Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • n/a iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.