CVE-2020-9844 Use after free in iOS
A remote attacker can cause system termination or corrupt kernel memory via a double free vulnerability in Apple operating systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-9844?
CVE-2020-9844 is a high-severity use after free vulnerability in Apple Ipados, published on 9 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A double free issue was addressed with improved memory management. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.
Weakness: CWE-415
Which versions are affected by CVE-2020-9844?
It affects 3 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X.
How do I fix CVE-2020-9844?
No fix has been published for CVE-2020-9844 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-9844 being exploited?
There is no known exploitation of CVE-2020-9844 in the wild and no public exploit code.
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-7hrr-4j8q-6rvg.