Linux 5.15 Is This Year's LTS Kernel

Written by Michael Larabel in Linux Kernel on 1 November 2021 at 08:40 AM EDT. 29 Comments
As we approach the end of the calendar year there was some uncertainty whether Linux 5.15 would be this year's Long-Term Support (LTS) kernel or if it would be Linux 5.16 albeit not likely releasing until the start of 2022...

Well, Greg Kroah-Hartman has decided on Linux 5.15 being the LTS kernel for 2021. The release page has been updated to reflect the newly-released Linux 5.15 kernel being an LTS branch.

At the moment the LTS period projects Linux 5.15 LTS to be end-of-life in October 2023. However, as is usually the case, this can be extended by years given enough industry support. If enough users/developers and organizations step up for committing to testing the new point releases and actually using the LTS kernel in production, the LTS period can be extended by several years.

Last year's Linux 5.10 LTS kernel is currently planned to be maintained through end of 2026 while 2019's Linux 5.4 LTS through end of 2025. So it's quite possible Linux 5.15 LTS could be maintained through end of 2027 if those conditions are met.

Linux 5.15 is quite an exciting update while some big additions are also en route for Linux 5.16 that led some to hope Linux 5.16 would be the LTS, albeit it's a never-ending game with upstream kernel development.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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