Answer in brief
CVE-2026-23447 records a High severity (CVSS 7.8) vulnerability in net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=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 | baf246d6680befde2086b1df9eb3aaba3fb6853f, 125f932a76a97904ef8a555f1dd53e5d0e288c54, af0d1613d6751489dbf9f69aac1123f0b1e566e5, a5bd5a2710310c965ea4153cba4210988a3454e2, de70da1fb1d152e981ecb3157f7ec2b633005c16, 77914255155e68a20aa41175edeecf8121dac391, 4.15, 4.20, 5.5 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Apr 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.