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Vulnerability record · CVE-2020-3981 · published 20 October 2020

CVE-2020-3981: Vmware cloud foundation out-of-bounds read vulnerability

Vmware · Cloud Foundation

VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202008101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x), Fusion (11.x before 11.5.6) contain an out-of-bounds read vulnerability due to a time-of-check time-of-use issue in ACPI device. A malicious actor with administrative access to a virtual machine may be able to exploit this issue to leak memory from the vmx process.

5.8 CVSS 3.1 Medium EPSS 0.80% · top 44.6% CWE-125 · Out-of-bounds readCWE-367 · TOCTOU race condition
5.8CVSS 3.1 base score, v2 3.5
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

VMware ESXi (7.0 before ESXi_7.0.1-0.0.16850804, 6.7 before ESXi670-202008101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x), Fusion (11.x before 11.5.6) contain an out-of-bounds read vulnerability due to a time-of-check time-of-use issue in ACPI device. A malicious actor with administrative access to a virtual machine may be able to exploit this issue to leak memory from the vmx process.

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.vmware.com/security/advisories/VMSA-2020-0023.html PatchVendor Advisory
https://www.vmware.com/security/advisories/VMSA-2020-0023.html PatchVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-3981), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.