GIGABYTE UEFI-GenericComponentSmmEntry 1.0.0 Software SMI SwSmiInputValue untrusted pointer dereference

Summaryinfo

A vulnerability, which was classified as critical, was found in GIGABYTE UEFI-GenericComponentSmmEntry 1.0.0. Impacted is the function SwSmiInputValue of the component Software SMI Handler. Such manipulation leads to untrusted pointer dereference. This vulnerability is listed as CVE-2025-7026. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in GIGABYTE UEFI-GenericComponentSmmEntry 1.0.0. It has been rated as critical. Affected by this issue is the function SwSmiInputValue of the component Software SMI Handler. The manipulation with an unknown input leads to a untrusted pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-822. The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used as an unchecked pointer in the CommandRcx0 function. If the contents at RBX match certain expected values (e.g., '$DB$' or '2DB$'), the function performs arbitrary writes to System Management RAM (SMRAM), leading to potential privilege escalation to System Management Mode (SMM) and persistent firmware compromise.

The advisory is available at gigabyte.com. This vulnerability is handled as CVE-2025-7026 since 07/02/2025. The exploitation is known to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/12/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-21137). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• GIGABYTE

Name

• UEFI-GenericComponentSmmEntry

Version

• 1.0.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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