product · inferred from evidence
Linux kernel
The core operating system kernel mentioned as having a bug.
- Tailscale health check ip6tables exit status 2 Extension MARK revision 0 not supported Linux 6.11
The root cause was a Linux kernel bug (a netfilter xtables typo), not a Tailscale bug, it was fixed upstream in kernels 6.11.6 and 6.6.59, and distros shipped the fix (NixOS, Arch 6.11.4-arch2-1, Ubuntu, Fedora). Upgrade your kernel to a fi