Vulnerability-Lookup

FKIE_CVE-2026-23447

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-07-24 21:10

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

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

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.7
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check\n\nThe same bounds-check bug fixed for NDP16 in the previous patch also\nexists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated\nagainst the total skb length without accounting for ndpoffset, allowing\nout-of-bounds reads when the NDP32 is placed near the end of the NTB.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly.\n\nCompile-tested only."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: usb: cdc_ncm: a\u00f1adir ndpoffset a la comprobaci\u00f3n de l\u00edmites de nframes de NDP32\n\nEl mismo error de comprobaci\u00f3n de l\u00edmites corregido para NDP16 en el parche anterior tambi\u00e9n existe en cdc_ncm_rx_verify_ndp32(). El tama\u00f1o del array DPE se valida contra la longitud total del skb sin tener en cuenta ndpoffset, permitiendo lecturas fuera de l\u00edmites cuando el NDP32 se coloca cerca del final del NTB.\n\nA\u00f1adir ndpoffset a la comprobaci\u00f3n de l\u00edmites de nframes y usar struct_size_t() para expresar el tama\u00f1o del array NDP-m\u00e1s-DPE m\u00e1s claramente.\n\nSolo probado en compilaci\u00f3n."
    }
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  "id": "CVE-2026-23447",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
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}

CVE-2026-23447 (GCVE-0-2026-23447)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-05-23 16:04

Title

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

Summary

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/125f932a76a97904e…
https://git.kernel.org/stable/c/af0d1613d6751489d…
https://git.kernel.org/stable/c/a5bd5a2710310c965…
https://git.kernel.org/stable/c/de70da1fb1d152e98…
https://git.kernel.org/stable/c/77914255155e68a20…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < 125f932a76a97904ef8a555f1dd53e5d0e288c54 (git) Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < af0d1613d6751489dbf9f69aac1123f0b1e566e5 (git) Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < a5bd5a2710310c965ea4153cba4210988a3454e2 (git) Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < de70da1fb1d152e981ecb3157f7ec2b633005c16 (git) Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < 77914255155e68a20aa41175edeecf8121dac391 (git) Affected: 8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7 (git) Affected: 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6 (git) Affected: a270ca35a9499b58366d696d3290eaa4697a42db (git) Affected: 4.14.317 , < 4.15 (semver) Affected: 4.19.285 , < 4.20 (semver) Affected: 5.4.245 , < 5.5 (semver)
Linux	Linux	Affected: 5.7 Unaffected: 0 , < 5.7 (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/cdc_ncm.c"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check\n\nThe same bounds-check bug fixed for NDP16 in the previous patch also\nexists in cdc_ncm_rx_verify_ndp32(). The DPE array size is validated\nagainst the total skb length without accounting for ndpoffset, allowing\nout-of-bounds reads when the NDP32 is placed near the end of the NTB.\n\nAdd ndpoffset to the nframes bounds check and use struct_size_t() to\nexpress the NDP-plus-DPE-array size more clearly.\n\nCompile-tested only."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:04:51.029Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54"
        },
        {
          "url": "https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16"
        },
        {
          "url": "https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391"
        }
      ],
      "title": "net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23447",
    "datePublished": "2026-04-03T15:15:30.495Z",
    "dateReserved": "2026-01-13T15:37:46.019Z",
    "dateUpdated": "2026-05-23T16:04:51.029Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-23447

CVE-2026-23447 (GCVE-0-2026-23447)

Tags

Sightings

Nomenclature