CVE-2021-33634

MEDIUMNVD 6.36.3—

6.3

iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.

CVSS v3: 6.3
EG Score: 6.3(medium)
EPSS: 10.1%
KEV: Not listed

Published

October 29, 2023

Last Modified

November 21, 2024

References (6)

securities@openeulerhttps://gitee.com/src-openeuler/lcr/pulls/251/files
securities@openeulerhttps://gitee.com/src-openeuler/lcr/pulls/257/files
securities@openeulerhttps://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1692
af854a3a-2127-422b-91ae-364da2661108https://gitee.com/src-openeuler/lcr/pulls/251/files
af854a3a-2127-422b-91ae-364da2661108https://gitee.com/src-openeuler/lcr/pulls/257/files
af854a3a-2127-422b-91ae-364da2661108https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1692

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-665

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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2026-06-01 13:50 UTCepss_batch
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2026-05-29 13:42 UTCepss_batch
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2026-05-28 13:43 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
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2026-05-24 14:55 UTCEG score recompute

Frequently asked(5)

What is CVE-2021-33634?

CVE-2021-33634 is a medium vulnerability published on October 29, 2023. iSulad uses the lcr+lxc runtime (default) to run malicious images, which can cause DOS.

When was CVE-2021-33634 disclosed?

CVE-2021-33634 was first published in the National Vulnerability Database on October 29, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-33634 actively exploited?

CVE-2021-33634 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-33634?

CVE-2021-33634 has a CVSS v3 base score of 6.3 (NVD).

How do I remediate CVE-2021-33634?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-33634, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-33634

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-33634?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)