HackMD
Flatcar Container Linux Release - February 18th, 2025
Alpha 4230.0.1
- AMD64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: EM
- ARM64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: EM
Beta 4186.1.1
- AMD64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: EM
- ARM64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: EM
Stable 4152.2.1
- AMD64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: None
- ARM64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: None
LTS 4081.3.1
- AMD64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: None
- ARM64-usr
- Platforms succeeded: All
- Platforms failed: None
- Platforms not tested: None
VERDICT: GO
Notes:
- Capacity issues was noticed in Hetzner, Openstack
Communication
Guidelines / Things to Remember
- Release notes are used in a PR and will appear on https://www.flatcar.org/releases/
- Announcement Message is posted in Flatcar-Linux-user. Make sure to post as “Flatcar Container Linux User”, not with your personal user (this can be selected when drafting the post).
- Make sure the the LTS is referred to as
LTS-2021, and notLTS-2605
Announcement Message
Subject: Announcing new releases Alpha 4230.0.1, Beta 4186.1.1, Stable 4152.2.1, LTS 4081.3.1
Hello,
We are pleased to announce a new Flatcar Container Linux maintenance release for the Alpha, Beta, Stable and LTS-2024 channel. The releases backports the patches to fix the OpenSSH CVEs: CVE-2025-26465, CVE-2025-26466
New Alpha Release 4230.0.1
Changes since Alpha 4230.0.0
Security fixes:
- openssh (CVE-2025-26465, CVE-2025-26466)
Updates:
- openssh(9.8_p1-r4)
New Beta Release 4186.1.1
Changes since Beta 4186.1.0
Security fixes:
- openssh (CVE-2025-26465, CVE-2025-26466)
Updates:
- openssh(9.8_p1-r4)
New Stable Release 4152.2.1
Changes since Stable 4152.2.0
Security fixes:
- openssh (CVE-2025-26465, CVE-2025-26466)
Updates:
- openssh(9.8_p1-r4)
New LTS Release 4081.3.1
Changes since LTS 4081.3.0
Security fixes:
- openssh (CVE-2025-26465, CVE-2025-26466)
Updates:
- openssh(9.8_p1-r4)
Best,
The Flatcar Container Linux Maintainers
Communication
Go/No-Go message for Matrix/Slack
Go/No-Go Meeting for Alpha 4230.0.1, Beta 4186.1.1, Stable 4152.2.1, LTS 4081.3.1
Pre-view images are available in https://bincache.flatcar-linux.net/images/amd64/$VERSION/
Tracking issue: https://github.com/flatcar/Flatcar/issues/1655
The Go/No-Go document is in our HackMD @flatcar namespace
Link: https://hackmd.io/P063YH3jRsWxPOaFA7Zk-w
Please give your Go/No-Go vote with 💚 for Go, ❌ for No-Go, and ✋ for Wait.
Contributors & community feel free to put your suggestions, thoughts or comments on the document or here in the chat.
@MAINTAINER @MAINTAINER @MAINTAINER
Mastodon
The toot (from @flatcar) goes out after the changelog update has been published; it includes a link to the web changelog.
OpenSSH CVE fixes are now available in the new Flatcar Alpha, Beta, Stable, LTS-2024 releases!
🔒 CVE fixes & security patches: OpenSSH (CVE-2025-26465, CVE-2025-26466)
📜 Release notes at the usual spot: https://www.flatcar.org/releases/
Kubernetes Slack
This goes in the #flatcar channel
Please welcome Flatcar releases of this month:
- Alpha 4230.0.1 (maintenance release)
- Beta 4186.1.1 (maintenance release)
- Stable 4152.2.1 (maintenance release)
- LTS 4081.3.1 (maintenance release)
OpenSSH CVE fixes are now available in the new Flatcar Alpha, Beta, Stable, LTS-2024 releases!
🔒 CVE fixes & security patches: OpenSSH (CVE-2025-26465, CVE-2025-26466)
📜 Release notes at the usual spot: https://www.flatcar.org/releases/
