🛡️ CVE-2022-35408 — insydeh2o

🟠 CVSS 8.2 — High ⚠️ Exploit Public CWE-123 NVD
8.2
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. An SMM callout vulnerability in the SMM driver in UsbLegacyControlSmm leads to possible arbitrary code execution in SMM and escalation of privileges. An attacker could overwrite the function pointers in the EFI_BOOT_SERVICES table before the USB SMI handler triggers. (This is not exploitable from code running in the operating system.)

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2022-35408 is classified as CWE-123: Write-what-where Condition. Any condition where the attacker has the ability to write an arbitrary value to an arbitrary location, often as the result of a buffer overflow.

Affected software

CVE-2022-35408 is recorded against 1 package.

  • insydeh2o (from 5.0 up to 05.09.38)

Timeline and source

Published on 22 September 2022 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

binarly.io
www.insyde.com
www.insyde.com
binarly.io
www.insyde.com
www.insyde.com

Details

Severity HIGH
CVSS Score 8.2
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE CWE-123
Public Exploit ⚠️ Yes
Source NVD
Published 2022-09-22
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
insydeh2o 5.0 05.09.38

Similar Threats

Exploit Protection

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