CVE-2017-4949

Severity: high (CVSS 7.0 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-01-11 · updated 2026-06-17
Weakness: CWE-416

Description

VMware Workstation and Fusion contain a use-after-free vulnerability in VMware NAT service when IPv6 mode is enabled. This issue may allow a guest to execute code on the host. Note: IPv6 mode for VMNAT is not enabled by default.

Affected products

VMware Fusion: from 8.0 before 8.5.10; from 10.0 before 10.1.1 — fixed in 10.1.1, 8.5.10
VMware Workstation: from 12.0 before 12.5.9; from 14.0 before 14.1.1 — fixed in 12.5.9, 14.1.1

How to fix

Upgrade to a fixed version: VMware Fusion 10.1.1, 8.5.10; VMware Workstation 12.5.9, 14.1.1. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/102489
http://www.securitytracker.com/id/1040161
https://www.vmware.com/security/advisories/VMSA-2018-0005.html
http://www.securityfocus.com/bid/102489
http://www.securitytracker.com/id/1040161
https://www.vmware.com/security/advisories/VMSA-2018-0005.html

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