CVE-2020-9958 Memory corruption in iOS
An out-of-bounds write in iOS allows applications to cause system termination or write kernel memory, requiring an OS upgrade.
- 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-2020-9958?
CVE-2020-9958 is a high-severity memory corruption vulnerability in Apple Ipados, published on 16 Oct 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
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.0 and iPadOS 14.0. An application may be able to cause unexpected system termination or write kernel memory.
Weakness: CWE-787
Which versions are affected by CVE-2020-9958?
It affects 2 products.
Products include Apple Ipados, Apple Iphone Os.
How do I fix CVE-2020-9958?
No fix has been published for CVE-2020-9958 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-9958 being exploited?
There is no known exploitation of CVE-2020-9958 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-ggv4-hh76-gfg8.