CVE-2025-7026

Summary

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.

Affected Software

Weaknesses

• CWE-822 Untrusted Pointer Dereference

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

CVE Program Container

Additional References

• https://www.kb.cert.org/vuls/id/746790

References

• https://www.gigabyte.com/Support/Security
• https://www.binarly.io/advisories/brly-dva-2025-008
• https://kb.cert.org/vuls/id/746790

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