CVE-2026-23447

HighCVSS 7.8/10Last modified Nov 5, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-129

Affected software

VendorProductVersions
LinuxLinux>= 0fa81b304a7973a499f844176ca031109487dd31, < baf246d6680befde2086b1df9eb3aaba3fb6853f; >= 0fa81b304a7973a499f844176ca031109487dd31, < 125f932a76a97904ef8a555f1dd53e5d0e288c54; >= 0fa81b304a7973a499f844176ca031109487dd31, < af0d1613d6751489dbf9f69aac1123f0b1e566e5; >= 0fa81b304a7973a499f844176ca031109487dd31, < a5bd5a2710310c965ea4153cba4210988a3454e2; >= 0fa81b304a7973a499f844176ca031109487dd31, < de70da1fb1d152e981ecb3157f7ec2b633005c16; >= 0fa81b304a7973a499f844176ca031109487dd31, < 77914255155e68a20aa41175edeecf8121dac391; 8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7; 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6; a270ca35a9499b58366d696d3290eaa4697a42db; >= 4.14.317, < 4.15; >= 4.19.285, < 4.20; >= 5.4.245, < 5.5
LinuxLinux5.7

References

Timeline

Published
Apr 3, 2026
Last modified
Nov 5, 2026
NVD status
Modified

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CVE-2026-23447: High severity, CVSS 7.8 | Vulnix