High severity7.8NVD Advisory· Published Apr 3, 2026· Updated Apr 23, 2026
CVE-2026-23447
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.
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Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=4.14.317,<4.15
- cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54nvdPatch
- git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391nvdPatch
- git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2nvdPatch
- git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5nvdPatch
- git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16nvdPatch
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