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.
Metrics
Affected Vendors & Products
References
History
Tue, 04 Nov 2025 20:30:00 +0000
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Status: PUBLISHED
Assigner: mitre
Published: 2021-10-01T02:21:29.000Z
Updated: 2025-11-04T19:12:30.965Z
Reserved: 2021-05-28T00:00:00.000Z
Link: CVE-2021-33626
No data.
Status : Modified
Published: 2021-10-01T03:15:06.593
Modified: 2025-11-04T20:16:00.367
Link: CVE-2021-33626
No data.