CVE Vulnerabilities

CVE-2022-33905

Time-of-check Time-of-use (TOCTOU) Race Condition

Published: Nov 15, 2022 | Modified: Nov 18, 2022
CVSS 3.x
7
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

DMA transactions which are targeted at input buffers used for the AhciBusDxe software SMI handler could cause SMRAM corruption (a TOCTOU attack). DMA transactions which are targeted at input buffers used for the software SMI handler used by the AhciBusDxe driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intels iSTARE group, Fixed in kernel 5.2: 05.27.23, kernel 5.3: 05.36.23, kernel 5.4: 05.44.23, kernel 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022047

Weakness

The 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. This can cause the product to perform invalid actions when the resource is in an unexpected state.

Affected Software

Name Vendor Start Version End Version
Kernel Insyde 5.2 (including) 5.2.05.27.23 (excluding)
Kernel Insyde 5.3 (including) 5.3.05.36.23 (excluding)
Kernel Insyde 5.4 (including) 5.4.05.44.23 (excluding)
Kernel Insyde 5.5 (including) 5.5.05.52.23 (excluding)

Potential Mitigations

References