v1.16.2 v1.17.0
firecracker-microvm/firecrackerSep 10, 2026 → Sep 10, 20260 days between releases
What's New
Adds official Linux 6.18 support and bzImage booting while maintaining vsock and virtio-mem fixes.
New Features
- Virtio device reset capability
- New metrics fields (emit_id, properties)
- Transparent huge pages option
- Official support for Linux 6.18 guest kernels
- Support for bzImage guest kernels on x86_64
Improvements
- Improved vsock throughput and reduced host CPU cost
- Transparent huge pages for guest memory
- New metrics reporting capabilities
- AWS Graviton5 instance support
Upgrade Notes
Snapshots created in v1.16.2 are incompatible with v1.17.0. v1.17.0 adds a new `huge_pages` field to snapshot loading and supports bzImage kernels automatically.
The Two Releases
Firecracker v1.16.2
Sep 10, 2026· 1 month ago
This release focuses on stability and performance fixes, addressing issues with the vsock device, virtio-mem management, and logger deadlocks. It also includes a compatibility fix for Linux 6.18 host kernels regarding CPUID and MSR handling.
Full release notesFirecracker v1.17.0
Sep 10, 2026· 1 month ago
Firecracker v1.17.0 adds support for the 6.18 Linux kernel, AWS Graviton5 instances, and transparent huge pages. It also introduces new metrics reporting capabilities and expands guest kernel support to include bzImage files on x86_64.
Full release notes