Vulnerability Database

309,134

Total vulnerabilities in the database

CVE-2021-20231

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.

  • Published: Mar 12, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-20231
  • Severity: Critical
  • Exploit:

CVSS v3:

  • Severity: Critical
  • Score: 9.8
  • AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
gnu / gnutls 3.6.3 3.7.1
redhat / enterprise_linux 8.0 8.0.x
fedoraproject / fedora 34 34.x