CVE-2026-31755 (GCVE-0-2026-31755)

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-05-01 14:14
VLAI?
Title
usb: cdns3: gadget: fix NULL pointer dereference in ep_queue
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash. Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints. This prevents potential crashes when ep_queue is called on endpoints that are not ready.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 3d1433fe34b224b90259e207e5389e95b504ef04 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9 (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < d61446dfc9d387775bb1b95b081953201b9222af (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 390536cc6af4ca5566bc3bf1f8b704700380cd2c (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f (git)
Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 7f6f127b9bc34bed35f56faf7ecb1561d6b39000 (git)
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    Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.134 , ≤ 6.6.* (semver)
Unaffected: 6.12.81 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/cdns3/cdns3-gadget.c"
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              "version": "6.12.81",
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              "version": "6.18.22",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.19.12",
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            },
            {
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              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: gadget: fix NULL pointer dereference in ep_queue\n\nWhen the gadget endpoint is disabled or not yet configured, the ep-\u003edesc\npointer can be NULL. This leads to a NULL pointer dereference when\n__cdns3_gadget_ep_queue() is called, causing a kernel crash.\n\nAdd a check to return -ESHUTDOWN if ep-\u003edesc is NULL, which is the\nstandard return code for unconfigured endpoints.\n\nThis prevents potential crashes when ep_queue is called on endpoints\nthat are not ready."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-01T14:14:46.288Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3d1433fe34b224b90259e207e5389e95b504ef04"
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          "url": "https://git.kernel.org/stable/c/7f6f127b9bc34bed35f56faf7ecb1561d6b39000"
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      "title": "usb: cdns3: gadget: fix NULL pointer dereference in ep_queue",
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    "datePublished": "2026-05-01T14:14:46.288Z",
    "dateReserved": "2026-03-09T15:48:24.139Z",
    "dateUpdated": "2026-05-01T14:14:46.288Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-05-05",
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  }
}


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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.