CVE-2021-21779
8.8
HIGH
CVSS 3.1
EPSS 0.73%
Description
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.
How to fix CVE-2021-21779
To remediate CVE-2021-21779, upgrade the affected package to a fixed version below.
- Debian/webkit2gtk—upgrade to 2.32.3-1 or later
- —upgrade to 2.32.3-1 or later
Is CVE-2021-21779 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.32.3-1
- from 0, < 2.32.3-1
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 |