CVE-2026-23447net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < baf246d6680befde2086b1df9eb3aaba3fb6853f
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < 125f932a76a97904ef8a555f1dd53e5d0e288c54
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < af0d1613d6751489dbf9f69aac1123f0b1e566e5
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < a5bd5a2710310c965ea4153cba4210988a3454e2
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < de70da1fb1d152e981ecb3157f7ec2b633005c16
- affected 0fa81b304a7973a499f844176ca031109487dd31 – < 77914255155e68a20aa41175edeecf8121dac391
- affected 8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7
- affected 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6
- affected a270ca35a9499b58366d696d3290eaa4697a42db
- affected 4.14.317 – < 4.15
- affected 4.19.285 – < 4.20
- affected 5.4.245 – < 5.5
- affected 5.7
- unaffected < 5.7
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.130 – ≤ 6.6.*
- unaffected 6.12.78 – ≤ 6.12.*
- unaffected 6.18.20 – ≤ 6.18.*
- unaffected 6.19.10 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References6
- https://git.kernel.org/stable/c/baf246d6680befde2086b1df9eb3aaba3fb6853f (opens in a new tab)
- https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54 (opens in a new tab)
- https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5 (opens in a new tab)
- https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2 (opens in a new tab)
- https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16 (opens in a new tab)
- https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-18694 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-23447)Record last updated .