CVE-2026-23447
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().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-129
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54Patch
- https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391Patch
- https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2Patch
- https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5Patch
- https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.