CVE-2026-23447

HIGH

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

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 7.8
EPSS 0.0001
EPSS Percentile 2.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-129
Status published
Products (19)
Linux/Linux < 5.7
Linux/Linux 0fa81b304a7973a499f844176ca031109487dd31 - 125f932a76a97904ef8a555f1dd53e5d0e288c54
Linux/Linux 0fa81b304a7973a499f844176ca031109487dd31 - 77914255155e68a20aa41175edeecf8121dac391
Linux/Linux 0fa81b304a7973a499f844176ca031109487dd31 - a5bd5a2710310c965ea4153cba4210988a3454e2
Linux/Linux 0fa81b304a7973a499f844176ca031109487dd31 - af0d1613d6751489dbf9f69aac1123f0b1e566e5
Linux/Linux 0fa81b304a7973a499f844176ca031109487dd31 - de70da1fb1d152e981ecb3157f7ec2b633005c16
Linux/Linux 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6
Linux/Linux 5.7
Linux/Linux 6.12.78 - 6.12.*
Linux/Linux 6.18.20 - 6.18.*
... and 9 more
Published Apr 03, 2026
Tracked Since Apr 03, 2026