Vulnerability-Lookup

FKIE_CVE-2026-43422

Vulnerability from fkie_nvd - Published: 2026-05-08 15:16 - Updated: 2026-05-22 17:46

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: legacy: ncm: Fix NPE in gncm_bind Commit 56a512a9b410 ("usb: gadget: f_ncm: align net_device lifecycle with bind/unbind") deferred the allocation of the net_device. This change leads to a NULL pointer dereference in the legacy NCM driver as it attempts to access the net_device before it's fully instantiated. Store the provided qmult, host_addr, and dev_addr into the struct ncm_opts->net_opts during gncm_bind(). These values will be properly applied to the net_device when it is allocated and configured later in the binding process by the NCM function driver.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b23e86a3a15803c3dcb24701285f73e65099fdf9	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be5738d19bed244ede84da45bc45395bcb1d99e0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fde0634ad9856b3943a2d1a8cc8de174a63ac840	Patch

Impacted products

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

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: legacy: ncm: Fix NPE in gncm_bind\n\nCommit 56a512a9b410 (\"usb: gadget: f_ncm: align net_device lifecycle\nwith bind/unbind\") deferred the allocation of the net_device. This\nchange leads to a NULL pointer dereference in the legacy NCM driver as\nit attempts to access the net_device before it\u0027s fully instantiated.\n\nStore the provided qmult, host_addr, and dev_addr into the struct\nncm_opts-\u003enet_opts during gncm_bind(). These values will be properly\napplied to the net_device when it is allocated and configured later in\nthe binding process by the NCM function driver."
    }
  ],
  "id": "CVE-2026-43422",
  "lastModified": "2026-05-22T17:46:33.000",
  "metrics": {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  "published": "2026-05-08T15:16:54.290",
  "references": [
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-43422 (GCVE-0-2026-43422)

Vulnerability from cvelistv5 – Published: 2026-05-08 14:21 – Updated: 2026-05-11 22:24

Title

usb: legacy: ncm: Fix NPE in gncm_bind

Summary

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/be5738d19bed244ed…
https://git.kernel.org/stable/c/b23e86a3a15803c3d…
https://git.kernel.org/stable/c/fde0634ad9856b394…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b62076e780a2121903ecf9ffdfb89c64647cb7da , < be5738d19bed244ede84da45bc45395bcb1d99e0 (git) Affected: 188338c1827842f898761a939669cf345bdf07e2 , < b23e86a3a15803c3dcb24701285f73e65099fdf9 (git) Affected: 56a512a9b4107079f68701e7d55da8507eb963d9 , < fde0634ad9856b3943a2d1a8cc8de174a63ac840 (git)
Linux	Linux	Affected: 6.18.17 , < 6.18.19 (semver) Affected: 6.19.7 , < 6.19.9 (semver)

Show details on NVD website

JSON

To clipboard

{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/legacy/ncm.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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            },
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              "version": "6.19.7",
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      "providerMetadata": {
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}

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.

Action not permitted

FKIE_CVE-2026-43422

CVE-2026-43422 (GCVE-0-2026-43422)

Tags

Sightings

Nomenclature