CVE-2022-32475 Race condition in n/a

High 7.0 Published 15 Feb 2023 Updated 5 May 2025

Attackers can exploit a TOCTOU race condition in the BIOS firmware to corrupt SMRAM and escalate privileges.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-32475?

CVE-2022-32475 is a high-severity vulnerability in Insyde Insydeh2o, published on 15 Feb 2023. 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. DMA attacks on the VariableRuntimeDxe shared buffer used by SMM and non-SMM code could cause TOCTOU race-condition issues that could lead to corruption of SMRAM and escalation of privileges. This issue was fixed in the kernel, which also protected chipset and OEM chipset code.

Weakness: CWE-367

Which versions are affected by CVE-2022-32475?

It affects 1 product.

Products include Insyde Insydeh2o.

How do I fix CVE-2022-32475?

No fix has been published for CVE-2022-32475 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-32475 being exploited?

There is no known exploitation of CVE-2022-32475 in the wild and no public exploit code.

All Insyde Insydeh2o vulnerabilities

Sources

Also known as GHSA-ffch-mwmj-f7w4.