What is CVE-2025-7028?

CVE-2025-7028 is a high-severity vulnerability in Gigabyte Uefi-Smiflash, classified under CWE-822 UNTRUSTED POINTER DEREFERENCE. CVSS score: 7.8/10. Published 2025-07-11.

How severe is CVE-2025-7028?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Gigabyte Uefi-Smiflash

CVE-2025-7028

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.

EPSS: 0.002 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Gigabyte Uefi-smiflash — versions 1.0.0

References

Frequently asked questions

What is CVE-2025-7028?: CVE-2025-7028 is a high-severity vulnerability in Gigabyte Uefi-Smiflash, classified under CWE-822 UNTRUSTED POINTER DEREFERENCE. CVSS score: 7.8/10. Published 2025-07-11.
How severe is CVE-2025-7028?: High severity. CVSS v3 base score is 7.8 out of 10.