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CVE-2026-31416

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: account for netlink header size This is a followup to an old bug fix: NLMSG_DONE needs to account for…

Published Apr 13, 2026EPSS 0.17%

Overview

CVE-2026-31416 is a medium-severity vulnerability. It was published on April 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

netfilter: nfnetlink_log: account for netlink header size

This is a followup to an old bug fix: NLMSG_DONE needs to account

for the netlink header size, not just the attribute size.

This can result in a WARN splat + drop of the netlink message,

but other than this there are no ill effects.

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/09883bf257f4243ed5a1fd35078ec6f0d0f3696aRefgit.kernel.org/stable/c/4ec216410fac9de83c99177a160ebb8d42fad075Refgit.kernel.org/stable/c/607245c4dbb86d9a10dd8388da0fb82170a99b61Refgit.kernel.org/stable/c/6b419700e459fbf707ca1543b7c1b57a60fedb73Refgit.kernel.org/stable/c/6d52a4a0520a6696bdde51caa11f2d6821cd0c01Refgit.kernel.org/stable/c/761b45c661af48da6a065868d59ab1e1f64fd9b6Refgit.kernel.org/stable/c/88a8f56e6276f616baad4274c6b8e4683e26e520Refgit.kernel.org/stable/c/f08ffa3e1c8e36b6131f69c5eb23700c28cbd262Refcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31416?

CVE-2026-31416 is a medium-severity vulnerability. It was published on April 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31416?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31416?

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-2026-31416?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31416 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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