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CVE-2026-64410netfilter: flowtable: IPIP tunnel hardware offload is not yet support

Description

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.

Timeline

  1. ID reserved

    By Linux

  2. · 6 days later

    Published

  3. · 23 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-64410, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.55% · top 53% of all CVEs (15 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Affected products

  • Linux · Linux

    • affected ab427db17885814069bae891834f20842f0ac3a4 – < 9efe838c13133acb70c78d04c49e8362fe533566
    • affected ab427db17885814069bae891834f20842f0ac3a4 – < 6c5dcab95f4cd42a1648739ec9300fbb4b1a021f

  • Linux · Linux

    • affected 6.19
    • unaffected < 6.19
    • unaffected 7.1.4 – ≤ 7.1.*
    • unaffected 7.2 – ≤ *

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .