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Fencer Vulns
high 8.8

CVE-2018-4312 json

A use after free issue was addressed with improved memory management.

published 2019-04-03 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16098

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.3%
EPSS 9.3% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

A use after free issue was addressed with improved memory management. This issue affected versions prior to iOS 12, tvOS 12, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.

Patch / fix

  • apple safari 12
  • apple icloud 7.7
  • apple itunes 12.9
  • apple iphone_os 12.0
  • apple tvos 12
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.22.0-2

debian advisories DEBIAN-CVE-2018-4312

  • webkit2gtk Ubuntu 18.04 LTS 2.22.2-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-4312

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • 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

Timeline

  1. First public exploit (EDB-45481)
  2. Published

Exploit prediction

9.35% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-45481 WebKit - 'WebCore::AXObjectCache::handleMenuItemSelected' Use-After-Free dos, 2018-09-25

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, Safari, iTunes for Windows, iCloud for Windows

Classification

Weakness

References

Sources

Fencer Vulns 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.