CVE-2019-8591 json
A type confusion issue was addressed with improved memory handling.
published 2019-12-18 6 y ago modified 2026-06-17 4 mo 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
Timeline
- First public exploit (EDB-46891)
- Published
Exploit prediction
4.44% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
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
-
support.apple.com
/HT210118
vendor-advisory
-
support.apple.com
/HT210119
vendor-advisory
-
support.apple.com
/HT210120
vendor-advisory
-
support.apple.com
/HT210122
vendor-advisory
Sources
- CVE List CVE-2019-8591
- NVD CVE-2019-8591
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.