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TI-2025-06393 Aliases CVE-2025-7027GHSA-9237-5j3g-vhw4

SMM Arbitrary Write via Dual-Controlled Pointers in CommandRcx1

Priority LOW 37Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00234 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GIGABYTEUEFI-GenericComponentSmmEntry1.0.0—No fix listedCNA
  • UEFI-GenericComponentSmmEntry VendorGIGABYTE Affected 1.0.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-7027
  2. 2026-10-03 Alias added: GHSA-9237-5j3g-vhw4

References

Other 3

  • TI-2018-13690 The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-13689 The GPCIDrv and GDrv low-level drivers in GIGABYTE APP Center v1.05.21 and earlier, AORUS… KEVCVSS 3.1HIGH 7.8
  • TI-2018-13688 The GPCIDrv and GDrv low-level drivers in GIGABYTE APP Center v1.05.21 and earlier, AORUS… KEVCVSS 3.1HIGH 7.8
  • TI-2018-13687 The GDrv low-level driver in GIGABYTE APP Center v1.05.21 and earlier, AORUS GRAPHICS… KEVCVSS 3.1HIGH 7.8
  • TI-2024-07516 Insecure Platform Key (PK) used in UEFI system firmware signature CVSS 3.1MEDIUM 6.4
  • TI-2017-02402 GIGABYTE BRIX UEFI firmware fails to securely implement BIOS write protection CVSS 3.0CRITICAL 9.8
See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences