CVE-2020-3982: VMware Cloud Foundation

High severity, CVSS 7.7. EPSS: 0.8% chance of exploitation in the next 30 days.

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 write 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 vulnerability to crash the virtual machine's vmx process or corrupt hypervisor's memory heap.

Affected products

• VMware Cloud Foundation: from 3.0, before 3.10.1 (fixed in 3.10.1); from 4.0, before 4.1 (fixed in 4.1)
• VMware ESXi: version 7.0.0 only; version 6.7 only; version 6.5 only
• VMware Fusion: from 11.0, before 11.5.6 (fixed in 11.5.6)
• VMware Workstation: from 15.0, up to and including 15.5.6
• VMware Workstation Player: from 15.0, up to and including 15.5.6

Published 2020-10-20. Last modified 2026-06-17.