CVE-2025-7026 (GCVE-0-2025-7026)
Vulnerability from cvelistv5 – Published: 2025-07-11 15:27 – Updated: 2026-02-26 17:50
VLAI
EPSS
VEX
Title
SMM Arbitrary Write via Unchecked RBX Pointer in CommandRcx0
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.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-12 03:55 UTC
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| GIGABYTE | UEFI-GenericComponentSmmEntry |
Affected:
1.0.0
|
guessed |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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