Why are all the custom Vibrant kernels using 2.6.32.9 - Vibrant Q&A, Help & Troubleshooting

I've spent a good amount of time searching and couldn't find an answer.
I follow Vibrant development for a friend and I've always wondered why the custom kernels always seem to use an older version of the linux kernel (2.6.32.9).
For N1's our custom kernels always got updated when a new version of the linux kernel comes out. Right now I'm at 2.6.37.2.
I thought it might be a source code thing but then that got released. Then I noticed in the Vibrant CM7 thead they run 2.6.35.7.
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Why don't these linux kernel updates make it into the custom kernels? There are lots of improvements. Or am I just wrong?

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We have the source for that version. I believe implementing a kernel from scratch for our phones will be damn near impossible.
Sent from my SGH-T959 using Tapatalk

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It uses the new kernel when you flash a new one or a rom with a new kernel but the numbers don't change. Don't know why though.
Sent from my SGH-T959 using XDA App

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birgertime said:
We have the source for that version. I believe implementing a kernel from scratch for our phones will be damn near impossible.
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Do you happen to know what stops the kernel from being re-based on a newer version?
DCrozier28 said:
It uses the new kernel when you flash a new one or a rom with a new kernel but the numbers don't change. Don't know why though.
Sent from my SGH-T959 using XDA App
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From what I can tell all the custom kernels run on 2.6.32.9 with the exception of the CM7 builds. There are never mentions updating the linux kernel. I can't tell from the file names or updates if it's happening.

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Maybe I was told wrong. I asked a similar question a few months back and that's how it was explained to me.
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DCrozier28 said:
Maybe I was told wrong. I asked a similar question a few months back and that's how it was explained to me.
Sent from my SGH-T959 using XDA App
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I don't think you were told wrong just maybe asked a different question. After spending too much time looking it 2.3 is based on the 2.6.35.7 kernel so that explains why it's on the 2.3 builds.
I think it's more of a problem building the kernel from scratch. I'm guess they start with the source they have which is a 2.6.32.9 base and make changes.