How severe is CVE-2022-35895?

CVE-2022-35895 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-35895 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-35895?

CVE-2022-35895 affects Insyde Insydeh2o. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-35895?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-35895 published?

CVE-2022-35895 was published on 2022-09-21 and last updated on 2026-06-17.

CVE-2022-35895

CVE-2022-35895 is a high-severity vulnerability in Insyde Insydeh2o with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Insyde Insydeh2o
Published: 2022-09-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-35895?: 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.
How severe is CVE-2022-35895?: CVE-2022-35895 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-35895 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-35895?: CVE-2022-35895 affects Insyde Insydeh2o. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-35895?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-35895 published?: CVE-2022-35895 was published on 2022-09-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:insyde:insydeh2o:*:*:*:*:*:*:*:*

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