What’s Vulnerable › Vulnerabilities

CVE-2023-39284

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-02 · updated 2026-06-17

Description

An issue was discovered in IhisiServicesSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. There are arbitrary calls to SetVariable with unsanitized arguments in the SMI handler.

Affected products

• Insydeh2O: from 5.2 before 5.2.05.28.33; from 5.3 before 5.3.05.37.33; from 5.4 before 5.4.05.45.33; from 5.5 before 5.5.05.53.33; from 5.6 before 5.6.05.60.33 — fixed in 5.2.05.28.33, 5.3.05.37.33, 5.4.05.45.33, 5.5.05.53.33, 5.6.05.60.33

How to fix

Upgrade to a fixed version: Insydeh2O 5.2.05.28.33, 5.3.05.37.33, 5.4.05.45.33, 5.5.05.53.33. Check the vendor advisory for mitigations.

References

• https://www.insyde.com/security-pledge
• https://www.insyde.com/security-pledge/SA-2023056
• https://www.insyde.com/security-pledge
• https://www.insyde.com/security-pledge/SA-2023056

Get alerted when CVE-2023-39284 or the next vulnerability affects your stack