CVE-2022-32471: insyde insydeh2o

Vulnerability summary

CVE-2022-32471 is a high (CVSS 7.0) vulnerability in insyde insydeh2o. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.5% of scored vulnerabilities.

Timeline

1. 15-02-2023
   PublishedVulnerability first disclosed.
2. 05-05-2025
   Last modifiedVulnerability information updated.

Description

An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. The IhisiDxe driver uses the command buffer to pass input and output data. By modifying the command buffer contents with DMA after the input parameters have been checked but before they are used, the IHISI SMM code may be convinced to modify SMRAM or OS, leading to possible data corruption or escalation of privileges.

• CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionThe product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.