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CVE-2026-43291

8.3 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: nfc: nci: Fix parameter validation for packet data Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for…

Published May 8, 2026CWE-908EPSS 0.41%

Overview

CVE-2026-43291 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

net: nfc: nci: Fix parameter validation for packet data

Since commit 9c328f54741b ("net: nfc: nci: Add parameter validation for

packet data") communication with nci nfc chips is not working any more.

The mentioned commit tries to fix access of uninitialized data, but

failed to understand that in some cases the data packet is of variable

length and can therefore not be compared to the maximum packet length

given by the sizeof(struct).

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/3b91160e9a91b5a2662875417dc42dc5b0bf03eaRefgit.kernel.org/stable/c/498fc5d0d650c77e87fcc73808d4f43240c21805Refgit.kernel.org/stable/c/571dcbeb8e635182bb825ae758399831805693c2Refgit.kernel.org/stable/c/a24a8a582da4426b2042e510a1080df84083b51dRefgit.kernel.org/stable/c/ad058a4317db7fdb3f09caa6ed536d24a62ce6a0Refgit.kernel.org/stable/c/c692db813a7e3b7c3c17d6e9a3ad2a018bf1142bRefgit.kernel.org/stable/c/f5218426f765eee22e178df9c126d974792fb6a5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43291?

CVE-2026-43291 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

How severe is CVE-2026-43291?

This vulnerability has a CVSS 3.1 base score of 8.3, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-43291?

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-2026-43291?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43291 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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