What is CVE-2022-35894?

CVE-2022-35894 is a medium-severity vulnerability in Insyde Insydeh2o, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.0/10. Published 2022-09-22.

How severe is CVE-2022-35894?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Insyde Insydeh2o

CVE-2022-35894

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The SMI handler for the FwBlockServiceSmm driver uses an untrusted pointer as the location to copy data to an attacker-specified buffer, leading to information disclosure.

Published 2022-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Insyde Insydeh2o

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

www.insyde.com/security-pledge (Vendor Advisory)
binarly.io/advisories/BRLY-2022-018/index.html (Exploit, Third Party Advisory)
www.insyde.com/security-pledge/SA-2022030 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-35894?: CVE-2022-35894 is a medium-severity vulnerability in Insyde Insydeh2o, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.0/10. Published 2022-09-22.
How severe is CVE-2022-35894?: Medium severity. CVSS v3 base score is 6.0 out of 10.