Yocto Project 4.0 'Kirkstone' (LTS)

End of life

4.0.35 Release notes ↗

Is Yocto Project 4.0 'Kirkstone' (LTS) still supported?

No

Yocto Project 4.0 'Kirkstone' (LTS) reached end of life on Apr 27, 2026 (5 months ago). It no longer gets updates, including security fixes. Upgrade to Yocto Project 6.0 'Wrynose' (LTS) (latest 6.0.3), supported until Apr 30, 2030.

Released
Apr 25, 2022
End of life
Apr 27, 2026
5 months ago
Latest version
4.0.35
Apr 29, 2026

Upgrade path

The recommended upgrade is Yocto Project 6.0 'Wrynose' (LTS), currently at 6.0.3 and supported until Apr 30, 2030.

Not sure? Run bitbake -e | grep '^DISTRO_VERSION\|DISTRO_CODENAME='

Quick answers

Is Yocto Project 4.0 'Kirkstone' (LTS) still supported?
No. Yocto Project 4.0 'Kirkstone' (LTS) reached end of life on Apr 27, 2026 (5 months ago). It no longer gets updates, including security fixes. Upgrade to Yocto Project 6.0 'Wrynose' (LTS) (latest 6.0.3), supported until Apr 30, 2030.
When is Yocto Project 4.0 'Kirkstone' (LTS) end of life?
Yocto Project 4.0 'Kirkstone' (LTS) reached end of life on Apr 27, 2026. It gets no more updates, including security fixes.
What is the latest version of Yocto Project 4.0 'Kirkstone' (LTS)?
The latest Yocto Project 4.0 'Kirkstone' (LTS) release is 4.0.35, released on Apr 29, 2026.
When was Yocto Project 4.0 'Kirkstone' (LTS) released?
Yocto Project 4.0 'Kirkstone' (LTS) was released on Apr 25, 2022.
What should I upgrade Yocto Project 4.0 'Kirkstone' (LTS) to?
The recommended upgrade is Yocto Project 6.0 'Wrynose' (LTS), currently at 6.0.3 and supported until Apr 30, 2030.
How do I check which Yocto Project version I have?
Run bitbake -e | grep '^DISTRO_VERSION\|DISTRO_CODENAME=', then paste the result into the “Am I up to date?” box on this page.

Other Yocto Project branches

All 15 →

← Yocto Project 3.4 'Honister' Yocto Project 4.1 'Langdale' →

Yocto Project 4.0 release history

RSS

Release dates for 36 Yocto Project 4.0 versions, newest first.

  1. 4.0.35
  2. 4.0.34
  3. 4.0.33
  4. 4.0.32
  5. 4.0.31
  6. 4.0.30
  7. 4.0.29
  8. 4.0.28
  9. 4.0.27
  10. 4.0.26
All 36 releases
  1. 4.0.25
  2. 4.0.24
  3. 4.0.23
  4. 4.0.22
  5. 4.0.21
  6. 4.0.20
  7. 4.0.19
  8. 4.0.18
  9. 4.0.17
  10. 4.0.16
  11. 4.0.15
  12. 4.0.14
  13. 4.0.13
  14. 4.0.12
  15. 4.0.11
  16. 4.0.10
  17. 4.0.9
  18. 4.0.8
  19. 4.0.7
  20. 4.0.6
  21. 4.0.5
  22. 4.0.4
  23. 4.0.3
  24. 4.0.2
  25. 4.0.1
  26. 4.0

Keep track

Yocto Project 4.0 'Kirkstone' (LTS) latest version badge

Official release policy · Checked 5 hours ago