CVE-2023-40400 Memory corruption in iOS and iPadOS
A remote attacker can cause unexpected app termination or execute arbitrary code on Apple devices, requiring an OS upgrade.
- 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-2023-40400?
CVE-2023-40400 is a critical memory corruption vulnerability in Apple Ipados, published on 26 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This issue was addressed with improved checks. This issue is fixed in tvOS 17, iOS 17 and iPadOS 17, watchOS 10, macOS Sonoma 14. A remote user may cause an unexpected app termination or arbitrary code execution.
Which versions are affected by CVE-2023-40400?
It affects 5 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Tvos, Apple Watchos.
How do I fix CVE-2023-40400?
No fix has been published for CVE-2023-40400 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-2023-40400 being exploited?
There is no known exploitation of CVE-2023-40400 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-6m3p-g8r6-fxvf.