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CVE-2021-38578

7.4
HIGHCVSS v3.1 Base Score
0.06%
LOW RiskEPSS (20th percentile)

Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

Published: 3/3/2022
Modified: 11/3/2025
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Vulnerability Summary

CVSS v3 Score

7.4HIGH

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L

CVSS v2 Score

7.5

AV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS Score (Exploitation Probability)

0.06%LOW Exploitation Risk
20th percentile

This vulnerability has a 0.06% probability of being exploited in the next 30 days, ranking higher than 20% of all scored CVEs.

CWE Classification

Related Vulnerabilities

Same Weakness Type(CWE-124)

Similar SeverityHIGH