Flatcar Container Linux
Flatcar Container Linux is the leading community-driven, container-optimized, auto-updating Linux distribution, homed in the Cloud Native Computing Foundation.
- 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...
- 🚀 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
- 🧪 Flatcar Beta 4515.1.0 is out! 📦 Updated to Linux 6.12.61 + refreshed ca-certificates 🔒 Major Linux kernel CVE rollup and multiple userspace security fixes ✨ New minimal first-stage initrd & larger partitions (from Alpha)
- ✅ Flatcar Stable 4459.2.2 available now! 📦 Linux updated to 6.12.61 with latest ca-certificates 🔒 Security-focused release with a large Linux kernel CVE fix set 🛡️ Recommended update for all Stable users
- Releases in the usual place: flatcar.org/releases/
- 📢 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.
- 🛡️ Stable: Linux 6.12.58 + udev fix for module loading ⚙️ Beta: Same kernel & fixes as Stable 🚀 Alpha: Adds back missing LDB modules (fixes SSSD) + improved sysext module loading 📜 Releases in the usual place: www.flatcar.org/releases/
- 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...
- 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...
- 🌅 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
- 🛡️ Stable 4459.2.0 → runc vuln fixes ✅ + Linux 6.12.54, new overlaybd sysext, Hyper-V using systemd-sysext layering, cgroups v1 mitigation, and CVE patches for OpenSSH, OpenSSL, curl, git, libxml2, NVIDIA, Intel µcode & more.
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- 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/
- 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/
- 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...
- On Saturday 16th 6:15pm, fromm.social/@thilo will demo Kubernetes deployment using Flatcar and systemd-sysext and how to handle the updates. programm.froscon.org/2025/events/... #systemd #sysext #linux #flatcar #OpenSource #DevOps #FrOSCon
- On Sunday 17th 4:00pm, fosstodon.org/@tormath1 will run a workshop to learn how to run, build and update systemd-sysext images on image based systems. programm.froscon.org/2025/events/... #systemd #sysext #linux #flatcar #OpenSource #DevOps #FrOSCon
- 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
- 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/
- 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!
- 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.
- 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...
- 📣 "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! 💪🐧
- 🔗 github.com/flatcar/Flat... 📹 meet.flatcar.org/TheMaintenan... 🐧 #Flatcar #MaintenanceMode #OpenSource #Linux #k8s
- 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/
- We are LIVE🔴 on Jitsi now. 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...
- 🗓️ 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...
- 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
- Alpha 4344.0.0 is now shipping Kernel 6.12.y serie which is likely to be part of the next Stable / LTS. CI can't cover all the usecases, give it a try and raise any workload turbulences.
- Alpha 4344.0.0 adds the #incus container runtime. One can enable Incus and disable Containerd/Docker from Ignition: www.flatcar.org/docs/latest/...
- 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/
- 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/
- 🚨 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/
- 🚀 New Blog Post Alert! 🚀 We had an incredible time at #FOSDEM2025! From showcasing Gentoo on an Amiga to engaging with the OS community, it was an unforgettable experience. Read abbot our journey and 🐧 www.flatcar.org/blog/2025/02...
- @linusmediagroup.com's latest video -POV: When you realize deploying your own VPN can be simple and secure with Flatcar #Flatcar #VPN #LinusTechTips www.youtube.com/watch?v=St-I...
- Did you know the Flatcar is built from Gentoo Linux? Join Chewi a maintainer of both projects (github.com/chewi) and see how they work together. fosdem.org/2025/schedul...
- What does it give to mix Cluster API, systemd-sysext and immutable OS? Find out in Thilo Fromm(github.com/t-lo) talk at FOSDEM: fosdem.org/2025/schedul...
- Next stop: Flatcar OS on RISC-V! 🚀 Check out Adrian Vladu (github.com/ader1990) talk at #FOSDEM2025 on adding RISC-V support to your OS! 🌟 fosdem.org/2025/schedul...
- We spoke with Danielle Tal, Product Manager at Microsoft, about how @flatcar.org Container Linux ensures security with its immutable filesystem, automated updates, and focus on compliance. Full Episode
