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

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-09-14 11:58
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
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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    "redhat_vex": {
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      "current_release_date": "2026-06-28T07:21:03+00:00",
      "cve": "CVE-2026-23447",
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      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "246",
      "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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T02:11:57Z",
      "cve": "CVE-2026-23447",
      "id": "CVE-2026-23447",
      "initial_release_date": "2026-04-03T23:27:36Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "151",
      "product_status:known_not_affected": "200",
      "product_status:recommended": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23447",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23447.json",
      "version": "14"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.