CVE-2025-7029
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BaseFortify

Publication date: 2025-07-11

Last updated on: 2025-11-03

Assigner: CERT/CC

Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used to derive pointers (OcHeader, OcData) passed into power and thermal configuration logic. These buffers are not validated before performing multiple structured memory writes based on OcSetup NVRAM values, enabling arbitrary SMRAM corruption and potential SMM privilege escalation.
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Meta Information
Published
2025-07-11
Last Modified
2025-11-03
Generated
2026-05-07
AI Q&A
2025-07-11
EPSS Evaluated
2026-05-05
NVD
CVE-2025-7029
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability exists in the Software SMI handler (SwSmiInputValue 0xB2) and allows a local attacker to control the RBX register. The RBX register is used to derive pointers to buffers (OcHeader, OcData) involved in power and thermal configuration logic. Because these buffers are not validated before multiple structured memory writes based on OcSetup NVRAM values, an attacker can cause arbitrary SMRAM corruption and potentially escalate privileges within the System Management Mode (SMM).


How can this vulnerability impact me? :

This vulnerability can allow a local attacker to corrupt System Management RAM (SMRAM) arbitrarily and escalate their privileges to the highly privileged System Management Mode (SMM). This could lead to unauthorized control over power and thermal configuration logic, potentially compromising system stability, security, and confidentiality.


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