CVE-2025-4423 SetupAutomationSmm:Vulnerability in the SMM module allow attacker to write arbitrary code and lead to memory corruption
Attackers can exploit a memory corruption flaw in Lenovo's SMM module to execute arbitrary code and escalate privileges.
- 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-2025-4423?
CVE-2025-4423 is a high-severity memory corruption vulnerability in InsydeH2O, published on 30 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The vulnerability was identified in the code developed specifically for Lenovo. Please visit "Lenovo Product Security Advisories and Announcements" webpage for more information about the vulnerability. https://support.lenovo.com/us/en/product_security/home
Weakness: CWE-119
Which versions are affected by CVE-2025-4423?
How do I fix CVE-2025-4423?
No fix has been published for CVE-2025-4423 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-2025-4423 being exploited?
There is no known exploitation of CVE-2025-4423 in the wild and no public exploit code.
Sources
Also known as GHSA-84fx-mhqp-q4r7.