CVE-2026-23447

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.

References

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