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Vulnerability record · CVE-2023-31364 · published 26 February 2026

CVE-2023-31364: Memory buffer overflow vulnerability

Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service.

8.3 CVSS 4.0 High EPSS 0.23% · top 87.1% CWE-119 · Memory buffer overflow Deferred
8.3CVSS 4.0 base score
0.23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Improper handling of direct memory writes in the input-output memory management unit could allow a malicious guest virtual machine (VM) to flood a host with writes, potentially causing a fatal machine check error resulting in denial of service.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7059.html

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Source: NIST National Vulnerability Database (record CVE-2023-31364), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.