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CVE-2026-74475

10.0 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapshot() in route_shortcircuit() The neighbour hardware address n->ha can be updated asynchronously by th…

Published Aug 15, 2026EPSS 0.45%

Overview

CVE-2026-74475 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

vxlan: use neigh_ha_snapshot() in route_shortcircuit()

The neighbour hardware address n->ha can be updated asynchronously by the

neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without

holding the seqlock loop can lead to torn reads or reading a partially updated

MAC address.

Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under

read_seqbegin()/read_seqretry() lock protection before using it.

Note that arp_reduce() and neigh_reduce() seem to have the same issue

left for future patches.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/05f2987f73daa05333fd713d05546142f9f7c5f0Refgit.kernel.org/stable/c/32a9590a8d30426e3db63e6b20893e47e02576c0Refgit.kernel.org/stable/c/87210054bad82bbae6f483a742dc45722fb47a6bRefgit.kernel.org/stable/c/8eca411347e1d38964f9ed2c8d3b6ab0e7e4473dRefgit.kernel.org/stable/c/d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0Refgit.kernel.org/stable/c/d0993fc053f29e15cc7c9fe2029df3882a2ab5abRefgit.kernel.org/stable/c/ec341bb76d77b4c2948764375ee6bfeef4bb41c3Refgit.kernel.org/stable/c/ff89415d34c3ab9f5312316423122e664ed3524f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74475?

CVE-2026-74475 is a critical-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2026-74475?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-74475?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-74475?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74475 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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