CVE-2025-7029 SMM Arbitrary Write via Unchecked OcHeader Buffer in Platform Configuration Handler
Local attackers can corrupt SMRAM and escalate privileges via unchecked buffer writes in GIGABYTE UEFI firmware.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-7029?
CVE-2025-7029 is a high-severity memory corruption vulnerability in GIGABYTE UEFI-OverClockSmiHandler, published on 11 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-7029?
How do I fix CVE-2025-7029?
No fix has been published for CVE-2025-7029 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-7029 being exploited?
There is no known exploitation of CVE-2025-7029 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-35m5-23fr-x9rq.