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

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-11-05 21:33
VLAI
Title
net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 21:31 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0fa81b304a7973a499f844176ca031109487dd31 , < baf246d6680befde2086b1df9eb3aaba3fb6853f (git)
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)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (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)
guessed Create a notification for this product.
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            "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."
          }
        ],
        "id": "CVE-2026-23447",
        "lastModified": "2026-11-05T22:18:26.660",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
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              "ssvcData": {
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                "options": [
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-05T21:31:15.822566Z",
                "version": "2.0.3"
              }
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        "published": "2026-04-03T16:16:30.663",
        "references": [
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            "tags": [
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          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16"
          }
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
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            "description": [
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                "lang": "en",
                "value": "CWE-129"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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        ]
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-07T04:28:23+00:00",
      "cve": "CVE-2026-23447",
      "id": "CVE-2026-23447",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "172",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23447.json",
      "version": "3"
    },
    "vulnrichment": {
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            "metrics": [
              {
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                  "content": {
                    "id": "CVE-2026-23447",
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                      },
                      {
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            ],
            "providerMetadata": {
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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              "product": "Linux",
              "programFiles": [
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                {
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                {
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              "product": "Linux",
              "programFiles": [
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              ],
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              "versions": [
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                },
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              "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."
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        "dateReserved": "2026-01-13T15:37:46.019Z",
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  }
}



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