CVE-2023-31356

MEDIUMNVD 4.44.4—
EchelonGraph scoreMEDIUM confidence

Score 4.4 from GitHub Security Advisory published 2024-08-13. NVD baseline CVSS 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.4Exploit: NoneExposed: 0

A fix is available — apply it.

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)
EG Risk
—
EPSS
11.9%
KEV
Not listed

Published

August 13, 2024

Last Modified

April 15, 2026

References (2)

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuamd64-microcode (3.20250311.1ubuntu0.24.10.1) @ oracular2026-05-21ubuntu
redhatlinux-firmware-0:20240827-124.git3cff7109.el8_102024-10-02redhat
redhatlinux-firmware-0:20240827-118.3.git3cff7109.el8_82024-10-02redhat
redhatlinux-firmware-0:20240905-143.3.el9_42024-10-02redhat
redhatlinux-firmware-0:20240905-138.3.el9_22024-10-02redhat
redhatlinux-firmware-0:20240827-114.3.git3cff7109.el8_62024-10-01redhat

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.

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 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-07-22 23:09 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
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  75. 2026-05-26 07:18 UTCEPSS rescore

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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 11.9% 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.

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