CVE-2021-20231
9.8
CRITICAL
CVSS 3.1
EPSS 1.2%
Description
A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.
How to fix CVE-2021-20231
To remediate CVE-2021-20231, upgrade the affected package to a fixed version below.
- Alpine/gnutls—upgrade to 3.6.15-r1 or later
- Debian/gnutls28—upgrade to 3.7.1-1 or later
Is CVE-2021-20231 being exploited?
Low — EPSS is 1.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.6.15-r1
- from 0, < 3.7.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |