CVE-2019-8591
A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2019-8591- CVSS 3.1
- 7.1 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H - CVSS 2.0
- 8.8 High
AV:N/AC:M/Au:N/C:N/I:C/A:C - Weakness
- CWE-843
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2019-8591- Updated
- 2026-11-02
EUVDEUVD-2019-17981 No score
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.
- Record
EUVD-2019-17981- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3fv9-r273-qjc2 No score
A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12...
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.
- Record
GHSA-3fv9-r273-qjc2- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Apple macOS < 10.14.5 / iOS < 12.3 XNU - Wild-read due to bad cast in stf_ioctl | 2019-05-21 |
| PoC in GitHub | jsherman212/used_sock | 2020-01-20 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-8591 is a high vulnerability (CVSS 7.1) in Apple Ios, published December 18, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.44%, the 91st percentile. No source names a fixed version.