CVE-2021-45970

An issue was discovered in IdeBusDxe in Insyde InsydeH2O with kernel 5.1 before 05.16.25, 5.2 before 05.26.25, 5.3 before 05.35.25, 5.4 before 05.43.25, and 5.5 before 05.51.25. A vulnerability exists in the SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer (the status code saved at the CommBuffer+4 location).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
8.2 HIGH
LOCAL
LOW
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 15%
VendorProductVersion
insydeinsydeh2o
5.1 ≤
𝑥
< 5.16.25
insydeinsydeh2o
5.2 ≤
𝑥
< 5.26.25
insydeinsydeh2o
5.3 ≤
𝑥
< 5.35.25
insydeinsydeh2o
5.4 ≤
𝑥
< 5.43.25
insydeinsydeh2o
5.5 ≤
𝑥
< 05.51.25
𝑥
= Vulnerable software versions