Multiple VMware Products vmxnet3 Virtual Network Adapter Information Disclosure Vulnerability [CVE-2018-6982]

CVE Number – CVE-2018-6982

A vulnerability in the vmxnet3 virtual network adapter used by multiple VMware products could allow a local attacker to access sensitive information on a targeted system.

The vulnerability is due to the use of uninitialized stack memory in the vmxnet3 virtual network adapter of affected VMware products. An attacker could exploit this vulnerability by sending a request that submits malicious input to the targeted system. A successful exploit could allow the attacker to access sensitive information, which could be used to conduct further attacks.

VMware has confirmed the vulnerability and released software updates.


  • To exploit this vulnerability, an attacker must have user-level access to the targeted system with the vmxnet3 virtual network adapter enabled. This access requirement may reduce the likelihood of a successful exploit.


  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to access local systems.

    Administrators are advised to allow only privileged users to access administration or management systems.

    Administrators are advised to monitor critical systems.

Vendor Announcements

  • VMware has released a security advisory at the following link: VMSA-2018-0027

Fixed Software

  • VMware has released software updates at the following link: ESXi 6.5 and 6.7 for registered users.

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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