updates for ESX 4.1

Hello Experts,

I am using ESX 4.1 update 3 and I want to bring my ESX infrastructure to the most update do date level. I have seen the following article that provides list of Releases and Builds

http://www.virten.net/vmware/esx-release-and-build-number-history/

According to the article the most up to date version of ESX 4.1 is:

ESX410-201410001      4.1.0 Patch 11a      2014-10-01      2168595

My question is, do I need to install every single patch from 4.1.0 Patch 6 to 4.1.0 Patch 11a in order to keep the ESX hosts up to date and secure or I can skip some of them and install just the latest one?

Many Thanks,
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muzzammilhussainAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You just need to install the last patch available.

e.g. 4.1.0 Patch 11a  

Patch 11.0 is available here

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2072477

Get it quick from the VMware patch portal.


Patch 11.0a is available here

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2090859

11a is for ESX. 11 is for ESX!
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muzzammilhussainAuthor Commented:
Hello Andrew,

I have installed the latest patch on ESX4.1 update 3 and on ESX 4.0 update 4 hosts. The path is very small and only updates bash. The build numbers on ESX hosts also have not changed. I have got the feeling that this installation did not include the patches that came in between ESX4.1 update 3 and the bash or ESX 4.0 update 4 and the bash so I may still be missing important updates. Can you please confirm if this is the case?

Many Thanks
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Build number should have changed.

which do you apply ?
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muzzammilhussainAuthor Commented:
I installed ESX4.1 update 3 and bash patch on ESX4.1 update 2. The build is showing 800380. I did this through the update manager of vCenter.
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muzzammilhussainAuthor Commented:
Patch 11.0a is only 1.9 MB so I have this feeling that is does not cover everything except the bash patch itself. The Vmware article says this:

 "VMware packaging policy dictates that the content of a patch RPM or VIB is cumulative throughout the product support life cycle"

The bash patch was released in October last year that was after the product support life cycle. Can this be the reason why this is not  cumulative ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It's possible, it's also worth checking the size of 11.0, and it may not have caused a build change.
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