How severe is CVE-2023-31356?

CVE-2023-31356 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-31356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-31356?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-31356 have an EU (EUVD) identifier?

Yes. CVE-2023-31356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35667.

When was CVE-2023-31356 published?

CVE-2023-31356 was published on 2024-08-13 and last updated on 2026-06-17.

CVE-2023-31356

CVE-2023-31356 is a medium-severity vulnerability with a CVSS 3.x base score of 4.4. 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-459.

Key facts

Severity: Medium (CVSS 3.x base score 4.4)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-35667
Weakness: CWE-459
Published: 2024-08-13
Last modified: 2026-06-17

Description

Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.

Frequently asked questions

What is CVE-2023-31356?: Incomplete system memory cleanup in SEV firmware could allow a privileged attacker to corrupt guest private memory, potentially resulting in a loss of data integrity.
How severe is CVE-2023-31356?: CVE-2023-31356 has a CVSS 3.x base score of 4.4, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2023-31356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-31356?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-31356 have an EU (EUVD) identifier?: Yes. CVE-2023-31356 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-35667.
When was CVE-2023-31356 published?: CVE-2023-31356 was published on 2024-08-13 and last updated on 2026-06-17.

References

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