Race condition in VMware ESXi, Fusion, Workstation and Cloud Foundation

Published: 2020-06-25 | Updated: 2020-07-01
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-3966
Exploitation vector Local
Public exploit N/A
Vulnerable software
VMware ESXi
Operating systems & Components / Operating system

VMware Fusion
Client/Desktop applications / Virtualization software

VMware Workstation
Client/Desktop applications / Virtualization software

Cloud Foundation
Client/Desktop applications / Virtualization software

Vendor VMware, Inc

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 01.07.2020

Updated vulnerability description and provided a link to ZDI.

1) Race condition

EUVDB-ID: #VU29299

Risk: Low


CVE-ID: CVE-2020-3966

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No


The vulnerability allows a local attacker to escalate privileges on the system.

The vulnerability exists due to a race condition in the USB 2.0 controller (EHCI). A local attacker can exploit the race, leading to heap-overflow and execute arbitrary code on the system.


Install updates from vendor's website.

Vulnerable software versions

VMware ESXi: 6.5 - 7.0

VMware Fusion: 11.0.0 - 11.5.1

VMware Workstation: 15.0.0 - 15.5.1

Cloud Foundation: 3.0 - 4.0

CPE2.3 External links


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?