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Fencer Intel
high 7.1

CVE-2019-8591 json

A type confusion issue was addressed with improved memory handling.

published 6y ago modified 4mo ago also EUVD-2019-17981

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
1
Exploit-DB

Summary

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12.3, macOS Mojave 10.14.5, tvOS 12.3, watchOS 5.2.1. An application may be able to cause unexpected system termination or write kernel memory.

Patch / fix

  • Apple iOS iOS 12.3
  • Apple macOS macOS Mojave 10.14.5
  • Apple tvOS tvOS 12.3
  • Apple watchOS watchOS 5.2.1

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Timeline

  1. First public exploit (EDB-46891)
  2. Published

Exploit prediction

4.44% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-46891 Apple macOS < 10.14.5 / iOS < 12.3 XNU - Wild-read due to bad cast in stf_ioctl dos, 2019-05-21

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
NVD 2.0 8.8 AV:N/AC:M/Au:N/C:N/I:C/A:C

Affected products

  • Apple iOS
  • Apple macOS
  • Apple tvOS
  • Apple watchOS

Classification

Weakness
  • CWE-843 Access of Resource Using Incompatible Type

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.