CVE-2022-32478

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the IdeBusDxe 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 attack can be mitigated using IOMMU protection for the ACPI runtime memory used for the command buffer. This attack can be mitigated by copying the firmware block services data to SMRAM before checking it.

Category

7.0
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.05%
Vendor Advisory insyde.com Vendor Advisory insyde.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.insyde.com/security-pledge vendor advisory
https://www.insyde.com/security-pledge/SA-2023010 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-32478?
CVE-2022-32478 has been scored as a high severity vulnerability.
How to fix CVE-2022-32478?
To fix CVE-2022-32478, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-32478 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-32478 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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