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Vulnerabilities CVE-2021-33626

CVE-2021-33626

None
Open
TLP:CLEAR
NVD CVE.org

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Description

A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). This can be used by an attacker to corrupt data in SMRAM memory and even lead to arbitrary code execution.

Details

EPSS Score ⓘ
0.31%

23.3th percentile

Confidence
90%
Published
Oct 1, 2021
Last Modified
Aug 11, 2026
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