Bugcheck 139 Blue Screen referencing Teefer when undocking or disconnecting from VPN

Products

• Endpoint Protection

Issue/Introduction

When undocking a laptop from it's dock or disconnecting from a VPN, a blue screen (BSOD) with a Bugcheck 139 error referencing teefer.sys as the cause is seen occasionally.

BSOD with Bugcheck 139 on Teefer.sys

Environment

Windows 10
SSL VPN client Citrix Gateway Plug-in
 

Resolution

This issue is resolved in Symantec Endpoint Protection 14.2 MP1. Upgrade the Symantec Endpoint Protection client to this version or higher to resolve the issue.