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Vulnerability record · CVE-2026-23447 · published 3 April 2026

CVE-2026-23447: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.9% CWE-129 · CWE-129
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
14 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54 Patch
https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391 Patch
https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2 Patch
https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5 Patch
https://git.kernel.org/stable/c/baf246d6680befde2086b1df9eb3aaba3fb6853f
https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-23447), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.