Vulnerability 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 Score
HIGH
References
- https://kb.cert.org/vuls/id/746790
- https://www.binarly.io/advisories/brly-2025-009
- https://www.gigabyte.com/Support/Security
- https://www.kb.cert.org/vuls/id/746790
FAQ
What is CVE-2025-7027?
CVE-2025-7027 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 fr...
How severe is CVE-2025-7027?
CVE-2025-7027 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-7027?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.