CVE-2020-27899 Use after free in iOS and iPadOS
A local attacker can exploit a use-after-free vulnerability in Apple operating systems to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-27899?
CVE-2020-27899 is a high-severity use after free vulnerability in Apple Ipados, published on 2 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.2 and iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, tvOS 14.2. A local attacker may be able to elevate their privileges.
Weakness: CWE-416
Which versions are affected by CVE-2020-27899?
It affects 5 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Tvos, Apple Watchos.
How do I fix CVE-2020-27899?
No fix has been published for CVE-2020-27899 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-2020-27899 being exploited?
There is no known exploitation of CVE-2020-27899 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-wc3v-9v7v-j6j8.