How severe is CVE-2021-23218?

CVE-2021-23218 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2021-23218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23218?

CVE-2021-23218 affects Mirantis Mirantis Container Runtime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23218?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-23218 published?

CVE-2021-23218 was published on 2022-01-10 and last updated on 2026-06-17.

CVE-2021-23218

CVE-2021-23218 is a medium-severity vulnerability in Mirantis Mirantis Container Runtime with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Mirantis Mirantis Container Runtime
Published: 2022-01-10
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2021-23218?: CVE-2021-23218 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2021-23218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23218?: CVE-2021-23218 affects Mirantis Mirantis Container Runtime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23218 published?: CVE-2021-23218 was published on 2022-01-10 and last updated on 2026-06-17.

References

https://github.com/Mirantis/security/blob/main/advisories/0002.md

Affected products (1)

cpe:2.3:a:mirantis:mirantis_container_runtime:20.10.8:*:*:*:*:*:*:*

Other CWE-401 (Missing Release of Memory after Effective Lifetime) vulnerabilities

CVE-2026-46289 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: lib/scatterlist: fix length calculations in…
CVE-2022-0742 — Critical (CVSS 9.1): Memory leak in icmp6 implementation in Linux Kernel 5.13+ allows a remote attacker to DoS a host by making it go…
CVE-2024-25450 — High (CVSS 8.8): imlib2 v1.9.1 was discovered to mishandle memory allocation in the function init_imlib_fonts().
CVE-2023-33718 — High (CVSS 8.8): mp4v2 v2.1.3 was discovered to contain a memory leak via MP4File::ReadString() at mp4file_io.cpp
CVE-2021-40633 — High (CVSS 8.8): A memory leak (out-of-memory) in gif2rgb in util/gif2rgb.c in giflib 5.1.4 allows remote attackers trigger an out of…
CVE-2021-3492 — High (CVSS 8.8): Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring…

Browse all CWE-401 (Missing Release of Memory after Effective Lifetime) vulnerabilities →