CVE-2021-21806
8.8
HIGH
CVSS 3.1
EPSS 1.3%
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.
How to fix CVE-2021-21806
To remediate CVE-2021-21806, upgrade the affected package to a fixed version below.
- Debian/webkit2gtk—upgrade to 2.30.6-1 or later
- —upgrade to 2.30.6-1 or later
Is CVE-2021-21806 being exploited?
Low — EPSS is 1.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.30.6-1
- from 0, < 2.30.6-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |