CVE-2025-7028

7.8 highEPSS 0.2%

High (7.8). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.8 high

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
Published: 2025-07-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://kb.cert.org/vuls/id/746790
https://www.binarly.io/advisories/brly-dva-2025-010
https://www.gigabyte.com/Support/Security
https://www.kb.cert.org/vuls/id/746790

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