CVE-2021-20231: Fedoraproject Fedora

Critical severity, CVSS 9.8. EPSS: 3.8% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 34 only
• GNU Gnutls: from 3.6.3, before 3.7.1 (fixed in 3.7.1)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp E-Series Performance Analyzer: affected versions not specified
• Red Hat Enterprise Linux: version 8.0 only

Published 2021-03-12. Last modified 2026-06-17.