CVE-2021-33834

HIGH

Insyde H2OFFT 6.20.00.00 - Out-of-bounds Write via IOCTL 0x22229a

Title source: llm
STIX 2.1

Description

An issue was discovered in iscflashx64.sys 3.9.3.0 in Insyde H2OFFT 6.20.00. When handling IOCTL 0x22229a, the input used to allocate a buffer and copy memory is mishandled. This could cause memory corruption or a system crash.

References (2)

Core 2

Scores

CVSS v3 7.1
EPSS 0.0019
EPSS Percentile 8.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-787
Status published
Products (2)
insyde/h2offt 6.20.00
insyde/iscflashx64.sys 3.9.3.0
Published Sep 08, 2023
Tracked Since Feb 18, 2026