CVE-2025-7027high

CVE-2025-7027: fallo de gravedad alta en GIGABYTE UEFI-GenericComponentSmmEntry

SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

Publicada el · Actualizada el

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 8.2epss 0.2%
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:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVEs relacionadas — GIGABYTE UEFI-GenericComponentSmmEntry

En el mismo producto, de las más peligrosas a las menos.