CVE-2022-35895

HIGH

8.2

CVSS Score

Published: September 21, 2022 at 08:36 PM UTC

Updated: June 17, 2026 at 04:52 AM UTC

1 product affected across 1 vendorInsydeH2O

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Severity

HIGH8.2

Exploit prediction

EPSS 0.4%

SSVC

PoC

Description

An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. The FwBlockSericceSmm driver does not properly validate input parameters for a software SMI routine, leading to memory corruption of arbitrary addresses including SMRAM, and possible arbitrary code execution.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

InsydeH2O · Insyde

95%

5.0 ≤ v < 05.09.375.1 ≤ v < 05.17.375.2 ≤ v < 05.27.295.3 ≤ v < 05.36.295.4 ≤ v < 05.44.295.5 ≤ v < 05.52.29

Affected range stops below 05.09.37, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.17.37, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.27.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.36.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.44.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 05.52.29, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://binarly.io/advisories/BRLY-2022-024/index.html

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.insyde.com/security-pledge

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.insyde.com/security-pledge/SA-2022033

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: NONE
Scope: CHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

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