Flatcar Container Linux
@flatcar.org
Flatcar Container Linux is the leading community-driven, container-optimized, auto-updating Linux distribution, homed in the Cloud Native Computing Foundation.
New Flatcar releases are out! 🚢
* Alpha 4820.0.0
* Beta 4790.1.0
* Stable 4757.2.0
This round brings kernel and runtime updates, security fixes, networking improvements, and a substantial Stable rollout.
* Alpha 4820.0.0
* Beta 4790.1.0
* Stable 4757.2.0
This round brings kernel and runtime updates, security fixes, networking improvements, and a substantial Stable rollout.
September 14, 2026 at 4:27 PM
New Flatcar releases are out! 🚢
* Alpha 4820.0.0
* Beta 4790.1.0
* Stable 4757.2.0
This round brings kernel and runtime updates, security fixes, networking improvements, and a substantial Stable rollout.
* Alpha 4820.0.0
* Beta 4790.1.0
* Stable 4757.2.0
This round brings kernel and runtime updates, security fixes, networking improvements, and a substantial Stable rollout.
Not happy to only maintain a distro, the Flatcar Linux team has been able to forecast the #Proxmox ARM64 support by releasing Flatcar ARM64 images for Proxmox 2y ago! Give it a shot with the updated documentation: www.flatcar.org/docs/latest/... and congrats Proxmox folks for this big update.
August 28, 2026 at 10:23 AM
Not happy to only maintain a distro, the Flatcar Linux team has been able to forecast the #Proxmox ARM64 support by releasing Flatcar ARM64 images for Proxmox 2y ago! Give it a shot with the updated documentation: www.flatcar.org/docs/latest/... and congrats Proxmox folks for this big update.
New Flatcar Container Linux releases are now available:
• Beta 4722.1.0
• Stable 4593.2.4
• LTS-2024 4081.3.9
Here’s what’s included in each release. 🧵
• Beta 4722.1.0
• Stable 4593.2.4
• LTS-2024 4081.3.9
Here’s what’s included in each release. 🧵
July 9, 2026 at 3:06 PM
New Flatcar Container Linux releases are now available:
• Beta 4722.1.0
• Stable 4593.2.4
• LTS-2024 4081.3.9
Here’s what’s included in each release. 🧵
• Beta 4722.1.0
• Stable 4593.2.4
• LTS-2024 4081.3.9
Here’s what’s included in each release. 🧵
New Flatcar Alpha, Beta and Stable releases now available!
📦 Many package updates: OpenSSH, Kernel, systemd
🔒 CVE fixes & security patches
🚀Oracle Cloud Infrastructure support
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: OpenSSH, Kernel, systemd
🔒 CVE fixes & security patches
🚀Oracle Cloud Infrastructure support
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
June 16, 2026 at 2:24 PM
New Flatcar Alpha, Beta and Stable releases now available!
📦 Many package updates: OpenSSH, Kernel, systemd
🔒 CVE fixes & security patches
🚀Oracle Cloud Infrastructure support
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: OpenSSH, Kernel, systemd
🔒 CVE fixes & security patches
🚀Oracle Cloud Infrastructure support
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 New Flatcar releases for all channels now available! 🚀
- Alpha 4694.0.1
- Beta 4628.1.2
- Stable 4593.2.2
- LTS-2024 4081.3.8
#linux #cloudnative #containers #updates
- Alpha 4694.0.1
- Beta 4628.1.2
- Stable 4593.2.2
- LTS-2024 4081.3.8
#linux #cloudnative #containers #updates
Releases
Releases
www.flatcar.org
June 2, 2026 at 12:19 PM
🚀 New Flatcar releases for all channels now available! 🚀
- Alpha 4694.0.1
- Beta 4628.1.2
- Stable 4593.2.2
- LTS-2024 4081.3.8
#linux #cloudnative #containers #updates
- Alpha 4694.0.1
- Beta 4628.1.2
- Stable 4593.2.2
- LTS-2024 4081.3.8
#linux #cloudnative #containers #updates
🚨 Fresh Flatcar Alpha, Beta, and Stable releases are now out with Linux 6.12.87 and a large set of kernel security fixes.
The recently disclosed Linux “Dirty Frag” privilege escalation flaws are addressed in these releases.
The recently disclosed Linux “Dirty Frag” privilege escalation flaws are addressed in these releases.
May 12, 2026 at 9:29 AM
🚨 Fresh Flatcar Alpha, Beta, and Stable releases are now out with Linux 6.12.87 and a large set of kernel security fixes.
The recently disclosed Linux “Dirty Frag” privilege escalation flaws are addressed in these releases.
The recently disclosed Linux “Dirty Frag” privilege escalation flaws are addressed in these releases.
Flatcar is unaffected by Copy Fail (CVE-2026-31431)!
The kernel option causing it was never enabled, because Flatcar is minimal by design and only ships what containers need
Sometimes the best mitigation is to reduce the attack surface by not shipping vulnerable components 🔒
The kernel option causing it was never enabled, because Flatcar is minimal by design and only ships what containers need
Sometimes the best mitigation is to reduce the attack surface by not shipping vulnerable components 🔒
May 11, 2026 at 3:47 PM
Flatcar is unaffected by Copy Fail (CVE-2026-31431)!
The kernel option causing it was never enabled, because Flatcar is minimal by design and only ships what containers need
Sometimes the best mitigation is to reduce the attack surface by not shipping vulnerable components 🔒
The kernel option causing it was never enabled, because Flatcar is minimal by design and only ships what containers need
Sometimes the best mitigation is to reduce the attack surface by not shipping vulnerable components 🔒
It's the last Friday of the month! 🛠️ Time for The Maintenance Mode.
April 24, 2026 at 8:39 AM
It's the last Friday of the month! 🛠️ Time for The Maintenance Mode.
🚀 We’re happy to announce a new platform for the Flatcar community - our new Discord server!
💬 Chat with others
🎙️ Join voice discussions
🛠️ Get help and learn
🤝 Contribute and share ideas
📢 Stay up to date with everything Flatcar
Join us 👉️ discord.gg/PMYjFUsJyq
💬 Chat with others
🎙️ Join voice discussions
🛠️ Get help and learn
🤝 Contribute and share ideas
📢 Stay up to date with everything Flatcar
Join us 👉️ discord.gg/PMYjFUsJyq
Join the Flatcar Container Linux Discord Server!
Flatcar Container Linux is a fully open source, minimal-footprint, secure by default and always up-to-date Linux distribution for running containers at scale. | 16 members
discord.gg
April 16, 2026 at 2:33 PM
🚀 We’re happy to announce a new platform for the Flatcar community - our new Discord server!
💬 Chat with others
🎙️ Join voice discussions
🛠️ Get help and learn
🤝 Contribute and share ideas
📢 Stay up to date with everything Flatcar
Join us 👉️ discord.gg/PMYjFUsJyq
💬 Chat with others
🎙️ Join voice discussions
🛠️ Get help and learn
🤝 Contribute and share ideas
📢 Stay up to date with everything Flatcar
Join us 👉️ discord.gg/PMYjFUsJyq
New Flatcar Alpha, Beta and Stable releases now available!
🚀 /etc is now shipped as #systemd confext
🔒 CVE fixes & security patches: CVE-2025-61984 and CVE-2025-61985 for OpenSSH on Stable
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 /etc is now shipped as #systemd confext
🔒 CVE fixes & security patches: CVE-2025-61984 and CVE-2025-61985 for OpenSSH on Stable
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
March 9, 2026 at 5:08 PM
New Flatcar Alpha, Beta and Stable releases now available!
🚀 /etc is now shipped as #systemd confext
🔒 CVE fixes & security patches: CVE-2025-61984 and CVE-2025-61985 for OpenSSH on Stable
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 /etc is now shipped as #systemd confext
🔒 CVE fixes & security patches: CVE-2025-61984 and CVE-2025-61985 for OpenSSH on Stable
📜 Release notes at the usual spot: www.flatcar.org/releases/
New Flatcar Alpha, Beta and Stable releases now available!
🔒 Security patches: recent OpenSSL vulnerabilities (openssl-library.org/news/vulnera...)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📜 To learn more about this kind of security releases: www.flatcar.org/blog/2022/11...
🔒 Security patches: recent OpenSSL vulnerabilities (openssl-library.org/news/vulnera...)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📜 To learn more about this kind of security releases: www.flatcar.org/blog/2022/11...
Vulnerabilities | OpenSSL Library
openssl-library.org
January 27, 2026 at 3:35 PM
New Flatcar Alpha, Beta and Stable releases now available!
🔒 Security patches: recent OpenSSL vulnerabilities (openssl-library.org/news/vulnera...)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📜 To learn more about this kind of security releases: www.flatcar.org/blog/2022/11...
🔒 Security patches: recent OpenSSL vulnerabilities (openssl-library.org/news/vulnera...)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📜 To learn more about this kind of security releases: www.flatcar.org/blog/2022/11...
🚀 Flatcar Alpha 4547.0.0 released!
📦 Big updates: Linux 6.12.61, Ignition 2.24.0, Go 1.25.3, OpenSSL 3.5.4
🔒 Extensive kernel CVE fixes + coreutils, Go & PAM security updates
✨ Smaller downloads & improved security defaults
📦 Big updates: Linux 6.12.61, Ignition 2.24.0, Go 1.25.3, OpenSSL 3.5.4
🔒 Extensive kernel CVE fixes + coreutils, Go & PAM security updates
✨ Smaller downloads & improved security defaults
December 18, 2025 at 4:10 PM
🚀 Flatcar Alpha 4547.0.0 released!
📦 Big updates: Linux 6.12.61, Ignition 2.24.0, Go 1.25.3, OpenSSL 3.5.4
🔒 Extensive kernel CVE fixes + coreutils, Go & PAM security updates
✨ Smaller downloads & improved security defaults
📦 Big updates: Linux 6.12.61, Ignition 2.24.0, Go 1.25.3, OpenSSL 3.5.4
🔒 Extensive kernel CVE fixes + coreutils, Go & PAM security updates
✨ Smaller downloads & improved security defaults
📢 Fresh Flatcar releases are baked and served!
Alpha 4515.0.1, Beta 4459.1.2, and Stable 4459.2.1 ship with
Linux 6.12.58, kernel CVE fixes, improved system extension
module loading, Nutanix support and restored SSSD components in Alpha.
Alpha 4515.0.1, Beta 4459.1.2, and Stable 4459.2.1 ship with
Linux 6.12.58, kernel CVE fixes, improved system extension
module loading, Nutanix support and restored SSSD components in Alpha.
November 27, 2025 at 1:27 PM
📢 Fresh Flatcar releases are baked and served!
Alpha 4515.0.1, Beta 4459.1.2, and Stable 4459.2.1 ship with
Linux 6.12.58, kernel CVE fixes, improved system extension
module loading, Nutanix support and restored SSSD components in Alpha.
Alpha 4515.0.1, Beta 4459.1.2, and Stable 4459.2.1 ship with
Linux 6.12.58, kernel CVE fixes, improved system extension
module loading, Nutanix support and restored SSSD components in Alpha.
We are sure you remember enough your French lessons to understand this great #DevFestNantes2025 talk presenting the Flatcar #Proxmox support implementation with #enix folks! (the auto-caption works fine for those who skipped the lessons 😉)
www.youtube.com/watch?v=ZMLL...
www.youtube.com/watch?v=ZMLL...
From Flatcar development to ProxmoxVE deployment - an example of open and sustainable collaboration
YouTube video by GDG France
www.youtube.com
November 20, 2025 at 12:07 PM
We are sure you remember enough your French lessons to understand this great #DevFestNantes2025 talk presenting the Flatcar #Proxmox support implementation with #enix folks! (the auto-caption works fine for those who skipped the lessons 😉)
www.youtube.com/watch?v=ZMLL...
www.youtube.com/watch?v=ZMLL...
Grab your favorite drink, set yourself "in a meeting" and watch this last episode from @rawkode.academy about Flatcar to learn or confirm your knowledge. Thanks @rawkode.dev for the invitation and for maintaining this collection of Cloud Native interviews.
www.youtube.com/watch?v=r66D...
www.youtube.com/watch?v=r66D...
Flatcar Linux: A Modern OS for the Always-On Infrastructure
YouTube video by Rawkode Academy
www.youtube.com
November 18, 2025 at 1:31 PM
Grab your favorite drink, set yourself "in a meeting" and watch this last episode from @rawkode.academy about Flatcar to learn or confirm your knowledge. Thanks @rawkode.dev for the invitation and for maintaining this collection of Cloud Native interviews.
www.youtube.com/watch?v=r66D...
www.youtube.com/watch?v=r66D...
🌅 New day, new Flatcar releases!
Alpha 4515.0.0, Beta 4459.1.1, and Stable 4459.2.0 are out with Linux 6.12.54, cgroups v1 kernel config mitigations, and major security updates across the stack.
#Flatcar #Linux #ContainerLinux
Alpha 4515.0.0, Beta 4459.1.1, and Stable 4459.2.0 are out with Linux 6.12.54, cgroups v1 kernel config mitigations, and major security updates across the stack.
#Flatcar #Linux #ContainerLinux
November 12, 2025 at 5:17 PM
🌅 New day, new Flatcar releases!
Alpha 4515.0.0, Beta 4459.1.1, and Stable 4459.2.0 are out with Linux 6.12.54, cgroups v1 kernel config mitigations, and major security updates across the stack.
#Flatcar #Linux #ContainerLinux
Alpha 4515.0.0, Beta 4459.1.1, and Stable 4459.2.0 are out with Linux 6.12.54, cgroups v1 kernel config mitigations, and major security updates across the stack.
#Flatcar #Linux #ContainerLinux
New Flatcar releases for all channels!
📦 Many package updates: Linux, Podman, curl, etc.
🔒 CVE fixes & security patches: VMScape Spectre variant patched for Linux, etc.
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, Podman, curl, etc.
🔒 CVE fixes & security patches: VMScape Spectre variant patched for Linux, etc.
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
September 16, 2025 at 8:54 AM
New Flatcar releases for all channels!
📦 Many package updates: Linux, Podman, curl, etc.
🔒 CVE fixes & security patches: VMScape Spectre variant patched for Linux, etc.
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, Podman, curl, etc.
🔒 CVE fixes & security patches: VMScape Spectre variant patched for Linux, etc.
📜 Release notes at the usual spot: www.flatcar.org/releases/
The Flatcar main repository has just reached thousand stars on GitHub. Can we all fit into a single Flatcar instance to celebrate this? The answer is yes. Thanks everyone 🌟
September 4, 2025 at 9:36 AM
The Flatcar main repository has just reached thousand stars on GitHub. Can we all fit into a single Flatcar instance to celebrate this? The answer is yes. Thanks everyone 🌟
New Flatcar releases for all channels now available and last LTS-2023 release!
📦 Many package updates: Podman, Linux, ...
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Podman, Linux, ...
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
August 20, 2025 at 8:44 AM
New Flatcar releases for all channels now available and last LTS-2023 release!
📦 Many package updates: Podman, Linux, ...
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Podman, Linux, ...
📜 Release notes at the usual spot: www.flatcar.org/releases/
At the #FrOSCon for the week-end? Come say "hi/hallo/bonjour !" and as we getting closer to the 1000th star on GitHub, if you star us and you are the 1000th one, come to the booth to receive your Flatcar t-shirt! github.com/flatcar/flat...
August 16, 2025 at 9:51 AM
At the #FrOSCon for the week-end? Come say "hi/hallo/bonjour !" and as we getting closer to the 1000th star on GitHub, if you star us and you are the 1000th one, come to the booth to receive your Flatcar t-shirt! github.com/flatcar/flat...
July's Maintenance Mode is now ON 🟢
📷 Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues for grabs - pick one and dive in!
📖This time focus is on documentation. Join us & help make them better.
🔗https://meet.flatcar.org/TheMaintenanceMode
📷 Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues for grabs - pick one and dive in!
📖This time focus is on documentation. Join us & help make them better.
🔗https://meet.flatcar.org/TheMaintenanceMode
July 25, 2025 at 6:59 AM
July's Maintenance Mode is now ON 🟢
📷 Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues for grabs - pick one and dive in!
📖This time focus is on documentation. Join us & help make them better.
🔗https://meet.flatcar.org/TheMaintenanceMode
📷 Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues for grabs - pick one and dive in!
📖This time focus is on documentation. Join us & help make them better.
🔗https://meet.flatcar.org/TheMaintenanceMode
In case you missed it, since the last release STACKIT images are now published on Alpha, Beta and Stable channels. Checkout the documentation to learn more about this freshly supported provider: www.flatcar.org/docs/latest/...
Running Flatcar on STACKIT
Running Flatcar on STACKIT
www.flatcar.org
July 17, 2025 at 7:36 AM
In case you missed it, since the last release STACKIT images are now published on Alpha, Beta and Stable channels. Checkout the documentation to learn more about this freshly supported provider: www.flatcar.org/docs/latest/...
New Flatcar Alpha, Beta, Stable, and LTS-2024 releases now available!
📦 Many package updates: Linux, sudo and others
🔒 CVE fixes & security patches: sudo (CVE-2025-32462, CVE-2025-32463)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, sudo and others
🔒 CVE fixes & security patches: sudo (CVE-2025-32462, CVE-2025-32463)
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
July 8, 2025 at 4:22 PM
New Flatcar Alpha, Beta, Stable, and LTS-2024 releases now available!
📦 Many package updates: Linux, sudo and others
🔒 CVE fixes & security patches: sudo (CVE-2025-32462, CVE-2025-32463)
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, sudo and others
🔒 CVE fixes & security patches: sudo (CVE-2025-32462, CVE-2025-32463)
📜 Release notes at the usual spot: www.flatcar.org/releases/