What is CVE-2023-22614?

CVE-2023-22614 is a high-severity vulnerability in Insyde Insydeh2o, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-04-11.

How severe is CVE-2023-22614?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Insyde Insydeh2o

CVE-2023-22614

An issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. There is insufficient input validation in BIOS Guard updates. An attacker can induce memory corruption in SMM by supplying malformed inputs to the BIOS Guard SMI handler.

Vulnerability class: Buffer Overflow

Published 2023-04-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (29.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Insyde Insydeh2o — versions 05.42.52.0026, 05.43.01.0026, 05.43.12.0056

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

www.insyde.com/security-pledge (Vendor Advisory)
www.insyde.com/security-pledge/SA-2023020 (Vendor Advisory)
research.nccgroup.com/2023/04/11/stepping-insyde-system-management-mode/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-22614?: CVE-2023-22614 is a high-severity vulnerability in Insyde Insydeh2o, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-04-11.
How severe is CVE-2023-22614?: High severity. CVSS v3 base score is 8.8 out of 10.