What is CVE-2026-64410?

CVE-2026-64410 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 6.19 onward and patched in 7.1.4 and 7.2. CVE-2026-64410 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64410?

CVE-2026-64410 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64410?

Yes, CVE-2026-64410 has been patched. Fixed versions include 7.1.4 and 7.2. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64410 actively exploited?

CVE-2026-64410 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64410

Critical

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.

Package Linux Kernel

Published 2026-07-25

Last modified 2026-09-04

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.19 and later are affected. Fixed in 7.1.4, 7.2 and their respective stable series.

Affected from

≥ 6.19

Fixed in

✓ 7.1.4 7.1.x ✓ 7.2

References

2 total

Kernel Git
https://git.kernel.org/stable/c/6c5dcab95f4cd42a1648739ec9300fbb4b1a021f

Patch
Kernel Git
https://git.kernel.org/stable/c/9efe838c13133acb70c78d04c49e8362fe533566

Patch

Details

CVE ID CVE-2026-64410

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-07-25

Modified 2026-09-04

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64410?

CVE-2026-64410 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 6.19 onward and has been patched in 7.1.4 and 7.2. CVE-2026-64410 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64410?

CVE-2026-64410 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64410?

Yes. CVE-2026-64410 has been patched. Fixed versions include 7.1.4 and 7.2. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64410 actively exploited?

No. CVE-2026-64410 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.