CVE-2023-31356

MEDIUMNVD 4.44.4—

4.4

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.

CVSS v3: 4.4
EG Score: 4.4(medium)
EPSS: 9.4%
KEV: Not listed

Published

August 13, 2024

Last Modified

April 15, 2026

References (2)

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	amd64-microcode (3.20250311.1ubuntu0.24.10.1) @ oracular	2026-05-21	ubuntu
redhat	linux-firmware-0:20240827-124.git3cff7109.el8_10	2024-10-02	redhat
redhat	linux-firmware-0:20240827-118.3.git3cff7109.el8_8	2024-10-02	redhat
redhat	linux-firmware-0:20240905-143.3.el9_4	2024-10-02	redhat
redhat	linux-firmware-0:20240905-138.3.el9_2	2024-10-02	redhat
redhat	linux-firmware-0:20240827-114.3.git3cff7109.el8_6	2024-10-01	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-459Incomplete Cleanup

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch

Frequently asked(5)

What is CVE-2023-31356?

CVE-2023-31356 is a medium vulnerability published on August 13, 2024. 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.

When was CVE-2023-31356 disclosed?

CVE-2023-31356 was first published in the National Vulnerability Database on August 13, 2024, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-31356 actively exploited?

CVE-2023-31356 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-31356?

CVE-2023-31356 has a CVSS v3 base score of 4.4 (NVD).

How do I remediate CVE-2023-31356?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-31356, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-31356

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