Is CVE-2022-33986 actively exploited?

No active exploitation of CVE-2022-33986 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-33986 be exploited remotely?

No. CVE-2022-33986 requires local access to exploit.

What is the CVSS score of CVE-2022-33986?

CVE-2022-33986 has a CVSS score of 6.4 (MEDIUM).

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MEDIUM

CVE-2022-33986

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

6.4

CVSS v3.1

Official Description

DMA attacks on the parameter buffer used by the VariableRuntimeDxe software SMI handler could lead to a TOCTOU attack. DMA attacks on the parameter buffer used by the software SMI handler used by the driver VariableRuntimeDxe could lead to a TOCTOU attack on the SMI handler and lead to corruption of SMRAM. This issue was discovered by Insyde engineering during a security review. This issue is fixed in Kernel 5.4: 05.44.23 and Kernel 5.5: 05.52.23. CWE-367 CWE-367 Report at: https://www.insyde.com/security-pledge/SA-2022056

NVD Source

Technical Analysis

CVE-2022-33986 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.