CVE-2021-21806 Use after free in Webkit
A use-after-free vulnerability in WebKitGTK allows remote code execution when a victim visits a malicious website.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-21806?
CVE-2021-21806 is a high-severity use after free vulnerability in Webkitgtk Webkitgtk, published on 8 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in remote code execution. The victim needs to visit a malicious web site to trigger the vulnerability.
Weakness: CWE-416
Which versions are affected by CVE-2021-21806?
It affects 1 product.
Products include Webkitgtk Webkitgtk.
How do I fix CVE-2021-21806?
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-2021-21806 being exploited?
There is no known exploitation of CVE-2021-21806 in the wild and no public exploit code.
Other vulnerabilities in Webkitgtk Webkitgtk
Sources
Also known as DEBIAN-CVE-2021-21806, GHSA-x2v5-56r3-vrw9, UBUNTU-CVE-2021-21806.