CVE-2022-33906

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

15/11/2022

Last modified:

30/04/2025

Description

DMA transactions which are targeted at input buffers used for the FwBlockServiceSmm software SMI handler 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 FwBlockServiceSmm driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel&#39;s iSTARE group. Fixed in kernel 5.2: 05.27.23, 5.3: 05.36.23, 5.4: 05.44.23, 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022048

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

6.40

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:insyde:kernel::::::::	5.2 (including)	5.2.05.27.23 (excluding)
cpe:2.3:a:insyde:kernel::::::::	5.3 (including)	5.3.05.36.23 (excluding)
cpe:2.3:a:insyde:kernel::::::::	5.4 (including)	5.4.05.44.23 (excluding)
cpe:2.3:a:insyde:kernel::::::::	5.5 (including)	5.5.05.52.23 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2022-33906

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools