CVE-2022-36448 Memory corruption in n/a

High 8.2 Published 28 Sep 2022 Updated 21 May 2025

Attackers can exploit SMM memory corruption in InsydeH2O BIOS to execute arbitrary code with high 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-2022-36448?

CVE-2022-36448 is a high-severity memory corruption vulnerability in Insyde Insydeh2o, published on 28 Sep 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. There is an SMM memory corruption vulnerability in the Software SMI handler in the PnpSmm driver.

Weakness: CWE-20

Which versions are affected by CVE-2022-36448?

It affects 1 product.

Products include Insyde Insydeh2o.

How do I fix CVE-2022-36448?

No fix has been published for CVE-2022-36448 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-2022-36448 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-36448 exists.

All Insyde Insydeh2o vulnerabilities

Sources

Also known as GHSA-cw76-gh48-42j3.