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Linux CVE-2026-64410

| EUVDEUVD-2026-48954 CRITICAL
2026-07-25 Linux GHSA-grq9-9wcr-7jrj
Information Disclosure Linux
Critical
Disputed · 9.8 Vendor: Linux
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Severity by source

Sources disagree (Medium–Critical)
Vendor (Linux) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SUSE
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Red Hat
7.0 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: Linux

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 05:49 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
9.8 (CRITICAL)
Patch available
Jul 25, 2026 - 11:18 EUVD
CVE Published
Jul 25, 2026 - 08:50 cve.org
CRITICAL 9.8
CVE Published
Jul 25, 2026 - 08:50 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Insufficient validation in the Linux kernel's netfilter flowtable hardware offload for IPIP tunnels could allow a remote attacker to cause information disclosure or denial of service. The flaw exists because the kernel would attempt to enqueue hardware offload work for IPIP tunnels despite no driver supporting it, leading to an unspecified impact when the unsupported configuration is processed. The issue is fixed by adding an early check to skip unsupported offload setup. No public exploit code is

Same technique Information Disclosure

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-64410 vulnerability details – vuln.today
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