CVE-2020-3995

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-10-20 · updated 2026-06-17
Weakness: CWE-401

Description

In VMware ESXi (6.7 before ESXi670-201908101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x before 15.1.0), Fusion (11.x before 11.1.0), the VMCI host drivers used by VMware hypervisors contain a memory leak vulnerability. A malicious actor with access to a virtual machine may be able to trigger a memory leak issue resulting in memory resource exhaustion on the hypervisor if the attack is sustained for extended periods of time.

Affected products

VMware Cloud Foundation: from 3.0 before 3.9 — fixed in 3.9
VMware ESXi: 6.7-670-201806001, 6.7-670-201807001, 6.7-670-201808001, 6.7-670-201810001, 6.7-670-201810101, 6.7-670-201810102 (+163); 6.7, 6.5
VMware Fusion: from 11.0.0 before 11.1.0 — fixed in 11.1.0
VMware Workstation: from 15.0.0 before 15.1.0 — fixed in 15.1.0
VMware ESXi, Workstation, Fusion: VMware ESXi (6.7 before ESXi670-201908101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x before 15.1.0), Fusion (11.x before 11.1.0)

How to fix

Upgrade to a fixed version: VMware Cloud Foundation 3.9; VMware Fusion 11.1.0; VMware Workstation 15.1.0. Check the vendor advisory for mitigations.

References

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