CVE-2022-33905

HIGH

Insyde Kernel 5.2-5.2.05.27.23 - SMRAM Corruption via AhciBusDxe DMA TOCTOU Race Condition

Title source: llm
STIX 2.1

Description

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 Intel's 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

References (2)

Core 2

Scores

CVSS v3 7.0
EPSS 0.0013
EPSS Percentile 3.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-367
Status published
Products (1)
insyde/kernel 5.2 - 5.2.05.27.23
Published Nov 15, 2022
Tracked Since Feb 18, 2026