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CVE-2026-23447

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check The same bounds-check bug fixed for NDP16 in the previous patch…

Published Apr 3, 2026CWE-129EPSS 0.13%

Overview

CVE-2026-23447 is a high-severity vulnerability. It was published on April 3, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check

The same bounds-check bug fixed for NDP16 in the previous patch also

exists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated

against the total skb length without accounting for ndpoffset, allowing

out-of-bounds reads when the NDP32 is placed near the end of the NTB.

Add ndpoffset to the nframes bounds check and use struct_size_t() to

express the NDP-plus-DPE-array size more clearly.

Compile-tested only.

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/125f932a76a97904ef8a555f1dd53e5d0e288c54Refgit.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391Refgit.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2Refgit.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5Refgit.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23447?

CVE-2026-23447 is a high-severity vulnerability. It was published on April 3, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23447?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23447?

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-2026-23447?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23447 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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