CVE-2026-64410

In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: IPIP tunnel hardware offload is not yet support No driver supports for IPIP tunnels yet, give up early on setting up the hardware offload for this scenario. This patch adds a stub that can be enhanced to add more configuration that are currently not supported. As of now, the offload work is enqueued to the worker, then ignored if the hardware offload configuration is not supported. Check the NF_FLOW_HW flag to know if this entry was already tried once to be offloaded so this is not retried on refresh when unsupported. Move NF_FLOW_HW flag check to nf_flow_offload_add(). If this NF_FLOW_HW flag is unset the _del and _stats variants are never called. This can be updated later on to skip hardware offload work to be queued in case hardware offload does not support it.

• https://git.kernel.org/stable/c/6c5dcab95f4cd42a1648739ec9300fbb4b1a021f
• https://git.kernel.org/stable/c/9efe838c13133acb70c78d04c49e8362fe533566

Published

Jul 25, 2026

Last Modified

Aug 11, 2026

Status

Awaiting Analysis

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