nsi memory leaks fixed yet?

Keep this thread open please.  I'm having the same issue with 50 computers.  Killing the svchost process if it's over 500k works for a while.  We've had IE11 installed for couple of years now I guess so I don't think it's specifically IE 11 related.  We also run citrix and quite possibly the keep alives associated with the ICA protocol may have something to do with it?  Just a thought.

I'm pretty sure KB2950358 fixed this for me.  https://support.microsoft.com/en-us/kb/2950358

The svchost process running the NSI service stays around 2-3MB.

In the event the level of memory leakage after reinstalling IE11 was still unacceptable to me, and I resorted to trying Microsoft Hotfixes KB2950358 and KB2847346.  The former gave a 'not required' message when I attempted to install it, but the latter installed without trouble and has reduced svchost.exe (LocalService) memory leakage to an extremely low level.  Possibly there is always some leakage by this service, but I have not monitored it before so cannot say for certain.  On my desktop it is currently has a Working Set stable at below 30MB.

Hope this helps and glad that I am not alone in having this problem, despite being 'careful' with my OS configuration.

Keep this thread open please.  I'm having the same issue with 50 computers.  Killing the svchost process if it's over 500k works for a while.  We've had IE11 installed for couple of years now I guess so I don't think it's specifically IE 11 related.  We also run citrix and quite possibly the keep alives associated with the ICA protocol may have something to do with it?  Just a thought.

I have had a similar experience to others, with a serious memory leak courtesy of the nsi service.  This started after I updated two quite different Win 7/ SP1 Pro 64 bit machines from IE10 to IE11 (one an HP AMD-based laptop, the other a Dell Intel Core i5 desktop).  In both cases the growth of svchost.exe (LocalService) was roughly exponential, as others have reported.

I fixed the laptop by uninstalling IE11, and then IE10 (taking me back to IE8), and then successively reinstalling back to IE11.  This machine now seems fine.

I repeated the process with the desktop, but after installing IE9 there was still some leakage, although much reduced.  IE10 refused to install at all, with error 9C59, but IE11 installed without problems, although took a long time.  I now still have some memory leakage on this machine, but it seems to be at a much reduced rate, and if it's not exponential then I may be able to live with it.

I will try the Hotfix if I am still in trouble.

It seems I was wrong in my case. After another restart it started increasing at a slower rate. My computer has been on for 23 days and svchost.exe is at 19,552K. I've had my computer on around 20 days multiple times so far and it has been around 20,000K. So it seems close enough to fixed for me that it's not an issue anymore.