CVE-2020-9839 Race condition in iOS
A race condition in Apple operating systems allows an application to gain elevated privileges, requiring users to update their devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-9839?
CVE-2020-9839 is a high-severity vulnerability in Apple Ipados, published on 9 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A race condition was addressed with improved state handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5. An application may be able to gain elevated privileges.
Weakness: CWE-362
Which versions are affected by CVE-2020-9839?
It affects 5 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Tvos, Apple Watchos.
How do I fix CVE-2020-9839?
No fix has been published for CVE-2020-9839 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-9839 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-9839 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in Apple Ipados
- CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-38pp-34cq-8xpr.