CVE-2026-23447: Linux vulnerability

CVE-2026-23447: net: usb: cdc_ncm: add ndpoffset to NDP32 nframes bounds check

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 14, 2026, 11:58 UTC (UTC+00:00)

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 3, 2026, 15:15 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

0ADP providers

7Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Jan 13, 2026, 15:37 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Apr 3, 2026, 15:15 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Sep 14, 2026, 11:58 UTC (UTC+00:00)

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/baf246d6680befde2086b1df9eb3aaba3fb6853fCVE reference, Linux
https://git.kernel.org/stable/c/125f932a76a97904ef8a555f1dd53e5d0e288c54CVE reference, Linux
https://git.kernel.org/stable/c/af0d1613d6751489dbf9f69aac1123f0b1e566e5CVE reference, Linux
https://git.kernel.org/stable/c/a5bd5a2710310c965ea4153cba4210988a3454e2CVE reference, Linux
https://git.kernel.org/stable/c/de70da1fb1d152e981ecb3157f7ec2b633005c16CVE reference, Linux
https://git.kernel.org/stable/c/77914255155e68a20aa41175edeecf8121dac391CVE reference, Linux

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinux0fa81b304a7973a499f844176ca031109487dd31, 0fa81b304a7973a499f844176ca031109487dd31, 0fa81b304a7973a499f844176ca031109487dd31, 0fa81b304a7973a499f844176ca031109487dd31, 0fa81b304a7973a499f844176ca031109487dd31, 0fa81b304a7973a499f844176ca031109487dd31, 8cf7db86a8984ffa3a3388a8df12bc0aa4c79bd7, 4ca8b8855264cf1439cdab3da7049bd1e3c2a9e6, a270ca35a9499b58366d696d3290eaa4697a42db, 4.14.317, 4.19.285, 5.4.245unaffected

LinuxLinux5.7, 0, 6.1.188, 6.6.130, 6.12.78, 6.18.20, 6.19.10, 7.0affected

Weakness

CWE details

No CWE listed

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