CVE-2026-9805
Received Received - Intake

FMTSWriteUseIntelLib Buffer Overflow in SMM

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: Insyde

Description
SMM IHISI command handler, FMTSWriteUseIntelLib, for FMTS command 0x32, read and write data without checking buffer size and could cause buffer overflow.

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Meta Information

Published
2026-08-26
Last Modified
2026-08-26
Generated
2026-08-26
AI Q&A
2026-08-26
EPSS Evaluated
N/A
NVD
CVE-2026-9805
EUVD
EUVD-2026-66226

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

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Executive Summary

This vulnerability is a buffer overflow issue in the SMM IHISI command handler named FMTSWriteUseIntelLib. It affects FMTS command 0x32 and allows reading and writing data without proper buffer size checks, potentially leading to memory corruption.

Impact Analysis

This vulnerability could allow an attacker with local access and high privileges to execute arbitrary code, escalate privileges, or cause system instability. It may lead to unauthorized data access or system crashes.

Mitigation Strategies

Apply vendor patches or updates for the affected SMM IHISI command handler. Disable or restrict access to the FMTS command 0x32 if not required. Monitor system logs for unusual buffer overflow attempts or memory access patterns.

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