What is CVE-2021-23218?

CVE-2021-23218 is a medium-severity vulnerability in Mirantis Container Runtime, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2022-01-10.

How severe is CVE-2021-23218?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Mirantis Container Runtime

CVE-2021-23218

When running with FIPS mode enabled, Mirantis Container Runtime 20.10.8 leaks memory during TLS Handshakes which could be abused to cause a denial of service.

Published 2022-01-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.009 (58.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mirantis Container Runtime — versions 20.10.8
Mirantis Container Runtime — versions 20.10.8

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/Mirantis/security/blob/main/advisories/0002.md (Third Party Advisory)

Frequently asked questions

What is CVE-2021-23218?: CVE-2021-23218 is a medium-severity vulnerability in Mirantis Container Runtime, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2022-01-10.
How severe is CVE-2021-23218?: Medium severity. CVSS v3 base score is 5.3 out of 10.