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.
📢 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/
Thanks everyone who contributed to this Friday's Flatcar Maintenance Mode: around 20 issues have been closed on Nebraska and Flatcar issue trackers (including the second oldest issue of the project!), fresh documentation has been written as well (the awaited #proxmox one!)
July 8, 2025 at 7:25 AM
Thanks everyone who contributed to this Friday's Flatcar Maintenance Mode: around 20 issues have been closed on Nebraska and Flatcar issue trackers (including the second oldest issue of the project!), fresh documentation has been written as well (the awaited #proxmox one!)
Flatcar images for #akamai are now fully tested in CI nightlies and before a release. This coverage promotes Akamai support to an official support. Thanks to Akamai for sponsoring infra to run those tests!
Running Flatcar on Akamai Connected Cloud (Linode)
Running Flatcar on Akamai Connected Cloud (Linode)
www.flatcar.org
June 30, 2025 at 1:05 PM
Flatcar images for #akamai are now fully tested in CI nightlies and before a release. This coverage promotes Akamai support to an official support. Thanks to Akamai for sponsoring infra to run those tests!
LTS-2023 EOL is fast approaching 🚨
LTS-2023 served us well, but its end-of-life is set for July 30th, 2025, and it's fast approaching. If you're still on this channel, please upgrade to LTS-2024 soon.
For any issues, feel free to reach out to us on Matrix.
LTS-2023 served us well, but its end-of-life is set for July 30th, 2025, and it's fast approaching. If you're still on this channel, please upgrade to LTS-2024 soon.
For any issues, feel free to reach out to us on Matrix.
June 27, 2025 at 9:19 AM
LTS-2023 EOL is fast approaching 🚨
LTS-2023 served us well, but its end-of-life is set for July 30th, 2025, and it's fast approaching. If you're still on this channel, please upgrade to LTS-2024 soon.
For any issues, feel free to reach out to us on Matrix.
LTS-2023 served us well, but its end-of-life is set for July 30th, 2025, and it's fast approaching. If you're still on this channel, please upgrade to LTS-2024 soon.
For any issues, feel free to reach out to us on Matrix.
Maintenance Mode is now ON 🟢🔘
Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues up for grabs - pick one and dive in!
🔗 meet.flatcar.org/TheMaintenan...
Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues up for grabs - pick one and dive in!
🔗 meet.flatcar.org/TheMaintenan...
📣 "Bug Smashing Fridays" is now "Maintenance Mode" and it kicks off this Friday!
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
June 27, 2025 at 8:04 AM
Maintenance Mode is now ON 🟢🔘
Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues up for grabs - pick one and dive in!
🔗 meet.flatcar.org/TheMaintenan...
Join us on Jitsi and start contributing to Flatcar Container Linux! There are plenty of exciting issues up for grabs - pick one and dive in!
🔗 meet.flatcar.org/TheMaintenan...
📣 "Bug Smashing Fridays" is now "Maintenance Mode" and it kicks off this Friday!
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
June 25, 2025 at 2:35 PM
📣 "Bug Smashing Fridays" is now "Maintenance Mode" and it kicks off this Friday!
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
🛠️ We're diving into bug triage, docs polish, and general maintenance to keep Flatcar Container Linux clean and resilient.
Open source folks — join us and help shape a stronger Flatcar! 💪🐧
New Flatcar Alpha, Beta, Stable releases now available!
📦 Many package updates: Linux, Go, nvidia-drivers
🔒 CVE fixes & security patches: Linux, curl, wget
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, Go, nvidia-drivers
🔒 CVE fixes & security patches: Linux, curl, wget
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
June 25, 2025 at 9:31 AM
New Flatcar Alpha, Beta, Stable releases now available!
📦 Many package updates: Linux, Go, nvidia-drivers
🔒 CVE fixes & security patches: Linux, curl, wget
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Many package updates: Linux, Go, nvidia-drivers
🔒 CVE fixes & security patches: Linux, curl, wget
📜 Release notes at the usual spot: www.flatcar.org/releases/
We are LIVE🔴 on Jitsi now.
Join us on our Jitsi stream and help triage bugs on our Tracker.
meet.flatcar.org/BugSmashingDay
Join us on our Jitsi stream and help triage bugs on our Tracker.
meet.flatcar.org/BugSmashingDay
🗓️ Bug Smashing Friday is here!
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
June 6, 2025 at 8:46 AM
We are LIVE🔴 on Jitsi now.
Join us on our Jitsi stream and help triage bugs on our Tracker.
meet.flatcar.org/BugSmashingDay
Join us on our Jitsi stream and help triage bugs on our Tracker.
meet.flatcar.org/BugSmashingDay
🗓️ Bug Smashing Friday is here!
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
June 5, 2025 at 4:47 PM
🗓️ Bug Smashing Friday is here!
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
Let’s kick off the first Friday of June by stomping bugs and triaging issues in the Flatcar Container Linux tracker.
Join us in cleaning up, categorizing, and closing bugs to help make Flatcar even more robust!
🔗 github.com/flatcar/Flat...
New Flatcar Alpha 4344.0.0 release now available!
📦 Many package updates: Kernel, Docker, Containerd, Amazon SSM agent
🔒 CVE fixes & security patches
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 Read this thread for the new features highlight
📦 Many package updates: Kernel, Docker, Containerd, Amazon SSM agent
🔒 CVE fixes & security patches
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 Read this thread for the new features highlight
Releases
Releases
www.flatcar.org
May 28, 2025 at 2:30 PM
New Flatcar Alpha 4344.0.0 release now available!
📦 Many package updates: Kernel, Docker, Containerd, Amazon SSM agent
🔒 CVE fixes & security patches
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 Read this thread for the new features highlight
📦 Many package updates: Kernel, Docker, Containerd, Amazon SSM agent
🔒 CVE fixes & security patches
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 Read this thread for the new features highlight
Announcing new Flatcar Beta, Stable and LTS-2024 maintenance releases!
📦 Package updates: Linux, ca-certificates
🔒 CVE fixes & security patches: Linux
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Package updates: Linux, ca-certificates
🔒 CVE fixes & security patches: Linux
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
May 6, 2025 at 1:41 PM
Announcing new Flatcar Beta, Stable and LTS-2024 maintenance releases!
📦 Package updates: Linux, ca-certificates
🔒 CVE fixes & security patches: Linux
📜 Release notes at the usual spot: www.flatcar.org/releases/
📦 Package updates: Linux, ca-certificates
🔒 CVE fixes & security patches: Linux
📜 Release notes at the usual spot: www.flatcar.org/releases/
Announcing new Flatcar Alpha, Beta, Stable, LTS-2024, LTS-2023 releases!
🚀 New features: EROFS support for systemd-sysext, experimental secure boot
🔒 CVE fixes & security patches: Linux, intel-microcode, curl & more
📦 Package updates
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 New features: EROFS support for systemd-sysext, experimental secure boot
🔒 CVE fixes & security patches: Linux, intel-microcode, curl & more
📦 Package updates
📜 Release notes at the usual spot: www.flatcar.org/releases/
Releases
Releases
www.flatcar.org
March 27, 2025 at 2:44 PM
Announcing new Flatcar Alpha, Beta, Stable, LTS-2024, LTS-2023 releases!
🚀 New features: EROFS support for systemd-sysext, experimental secure boot
🔒 CVE fixes & security patches: Linux, intel-microcode, curl & more
📦 Package updates
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚀 New features: EROFS support for systemd-sysext, experimental secure boot
🔒 CVE fixes & security patches: Linux, intel-microcode, curl & more
📦 Package updates
📜 Release notes at the usual spot: www.flatcar.org/releases/
🚨 Attention Flatcar users: We're deprecating cgroups v1 to enhance performance and security. Transition to cgroups v2 to stay updated. For more details, visit our release notes: www.flatcar.org/releases
February 20, 2025 at 9:21 AM
🚨 Attention Flatcar users: We're deprecating cgroups v1 to enhance performance and security. Transition to cgroups v2 to stay updated. For more details, visit our release notes: www.flatcar.org/releases
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: www.flatcar.org/releases/
🔒 CVE fixes & security patches: OpenSSH (CVE-2025-26465, CVE-2025-26466)
📜 Release notes at the usual spot: www.flatcar.org/releases/
February 19, 2025 at 12:41 PM
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: www.flatcar.org/releases/
🔒 CVE fixes & security patches: OpenSSH (CVE-2025-26465, CVE-2025-26466)
📜 Release notes at the usual spot: www.flatcar.org/releases/