CVE-2020-36329 Use after free in libwebp
A use-after-free flaw in libwebp allows attackers to compromise data confidentiality, integrity, and system availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-36329?
CVE-2020-36329 is a critical use after free vulnerability in Apple Ipados, published on 21 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in libwebp in versions before 1.0.1. A use-after-free was found due to a thread being killed too early. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-416
Which versions are affected by CVE-2020-36329?
It affects 6 products.
Products include Apple Ipados, Apple Iphone Os, Debian Debian Linux, Netapp Ontap Select Deploy Administration Utility, Redhat Enterprise Linux, Webmproject Libwebp.
How do I fix CVE-2020-36329?
Upgrade to a fixed version.
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-2020-36329 being exploited?
There is no known exploitation of CVE-2020-36329 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 DEBIAN-CVE-2020-36329, GHSA-mprg-gw36-367p, UBUNTU-CVE-2020-36329.