CVE-2020-3960

Severity: high (CVSS 8.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-09-15 · updated 2026-06-17
Weakness: CWE-125

Description

VMware ESXi (6.7 before ESXi670-202006401-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.5), and Fusion (11.x before 11.5.5) contain an out-of-bounds read vulnerability in NVMe functionality. A malicious actor with local non-administrative access to a virtual machine with a virtual NVMe controller present may be able to read privileged information contained in physical memory.

Affected products

VMware Fusion: from 11.0.0 before 11.5.5 — fixed in 11.5.5
VMware Vsphere Esxi: 6.5, 6.5-650-201701001, 6.5-650-201703001, 6.5-650-201703002, 6.5-650-201704001, 6.5-650-201710001 (+15)
VMware Workstation: from 15.0.0 before 15.5.5 — fixed in 15.5.5
VMware ESXi, Workstation and Fusion: VMware ESXi (6.7 before ESXi670-202006401-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.5), and Fusion (11.x before 11.5.5)

How to fix

Upgrade to a fixed version: VMware Fusion 11.5.5; VMware Workstation 15.5.5. Check the vendor advisory for mitigations.

References

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