CVE-2022-35408

Name: CVE-2022-35408
Creator: NVD / NIST
Published: 2022-09-22T16:15:09.607+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2022-35408 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

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.)

Metrics

CVSS 3.1

8.2/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.33%

24.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-123

Affected Software

Vendor	Product	Versions
Insyde	Insydeh2o	>= 5.1, < 5.17.38
Insyde	Insydeh2o	>= 5.2, < 05.27.28
Insyde	Insydeh2o	>= 5.3, < 05.36.28
Insyde	Insydeh2o	>= 5.4, < 05.44.28
Insyde	Insydeh2o	>= 5.5, < 05.52.28
Insyde	Insydeh2o	>= 5.0, < 05.09.38

References

https://binarly.io/advisories/BRLY-2022-022/index.htmlExploit, Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory
https://www.insyde.com/security-pledge/SA-2022031Vendor Advisory
https://binarly.io/advisories/BRLY-2022-022/index.htmlExploit, Third Party Advisory
https://www.insyde.com/security-pledgeVendor Advisory
https://www.insyde.com/security-pledge/SA-2022031Vendor Advisory

Timeline

Published: Sep 22, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-35408?

How severe is CVE-2022-35408?

CVE-2022-35408 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2022-35408?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-35408?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST