Is CVE-2022-31243 actively exploited?

No active exploitation of CVE-2022-31243 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-31243 be exploited remotely?

No. CVE-2022-31243 requires local access to exploit.

What is the CVSS score of CVE-2022-31243?

CVE-2022-31243 has a CVSS score of 6.4 (MEDIUM).

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MEDIUM

CVE-2022-31243

CWE-367Published: November 15, 2022· Updated: Jun 17, 2026

6.4

CVSS v3.1

Official Description

Update description and links DMA transactions which are targeted at input buffers used for the software SMI handler used by the FvbServicesRuntimeDxe driver could cause SMRAM corruption through a TOCTOU attack.. "DMA transactions which are targeted at input buffers used for the software SMI handler used by the FvbServicesRuntimeDxe driver could cause SMRAM corruption. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. Fixed in Kernel 5.2: 05.27.21. Kernel 5.3: 05.36.21. Kernel 5.4: 05.44.21. Kernel 5.5: 05.52.21 https://www.insyde.com/security-pledge/SA-2022044

NVD Source

Technical Analysis

CVE-2022-31243 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.4.