CVE-2022-33986

MEDIUM

Insyde Kernel 5.4-5.4.05.44.23 - TOCTOU Race Condition in VariableRuntimeDxe SMI Handler

Title source: llm
STIX 2.1

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

References (2)

Core 2

Scores

CVSS v3 6.4
EPSS 0.0013
EPSS Percentile 3.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-367
Status published
Products (1)
insyde/kernel 5.4 - 5.4.05.44.23
Published Nov 15, 2022
Tracked Since Feb 18, 2026