CVE-2025-7028
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-11

Last updated on: 2025-11-03

Assigner: CERT/CC

Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0x20) allows a local attacker to supply a crafted pointer (FuncBlock) through RBX and RCX register values. This pointer is passed unchecked into multiple flash management functions (ReadFlash, WriteFlash, EraseFlash, and GetFlashInfo) that dereference both the structure and its nested members, such as BufAddr. This enables arbitrary read/write access to System Management RAM (SMRAM), allowing an attacker to corrupt firmware memory, exfiltrate SMRAM content via flash, or install persistent implants.
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Meta Information
Published
2025-07-11
Last Modified
2025-11-03
Generated
2026-05-27
AI Q&A
2025-07-11
EPSS Evaluated
2026-05-25
NVD
CVE-2025-7028
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
american_megatrends ami_firmware *
gigabyte uefi_firmware *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability exists in the Software SMI handler (SwSmiInputValue 0x20) where a local attacker can supply a crafted pointer through RBX and RCX registers. This pointer is used without validation in multiple flash management functions, allowing the attacker to read from and write to System Management RAM (SMRAM). This can lead to corruption of firmware memory, exfiltration of SMRAM content, or installation of persistent implants.


How can this vulnerability impact me? :

The vulnerability can allow an attacker with local access to corrupt firmware memory, steal sensitive information stored in SMRAM, or install persistent implants that could maintain unauthorized control over the system.


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