CVE-2020-5956

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CVSS 3.1

7.5 high

EPSS

<1%p55

Published

Jan 5, 2022 (Jan 5, 2022)

Modified

Jun 17, 2026

Description

An issue was discovered in SdLegacySmm in Insyde InsydeH2O with kernel 5.1 before 05.15.11, 5.2 before 05.25.11, 5.3 before 05.34.11, and 5.4 before 05.42.11. The software SMI handler allows untrusted external input because it does not verify CommBuffer.

Vendors: insyde
Products: insydeh2o
Weakness: CWE-20
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.8%)

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