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.
Loading...
Loading...
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 21% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
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.
March 12, 2021
November 21, 2024
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | libgnutls-openssl27 (3.6.13-2ubuntu1.6) @ focal | 2026-05-26 | ubuntu |
| redhat | nettle-0:3.4.1-7.el8 | 2021-11-09 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-20231
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.
msrc · redhat
CWE-416