CVE-2025-7027
HIGH EPSS 9.9%
Published Jul 11, 202511mo ago · Modified Jun 17, 20261w ago
8.2 CVSS 3.1
Published Jul 11, 2025 11mo ago
Last Modified Jun 17, 2026 1w ago
Description
A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control both the read and write addresses used by the CommandRcx1 function. The write target is derived from an unvalidated UEFI NVRAM variable (SetupXtuBufferAddress), while the write content is read from an attacker-controlled pointer based on the RBX register. This dual-pointer dereference enables arbitrary memory writes within System Management RAM (SMRAM), leading to potential SMM privilege escalation and firmware compromise.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
9.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
References 4
- kb.cert.org https://kb.cert.org/vuls/id/746790
- binarly.io https://www.binarly.io/advisories/brly-2025-009
- gigabyte.com https://www.gigabyte.com/Support/Security
- kb.cert.org https://www.kb.cert.org/vuls/id/746790
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.