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

Vulnerability from cvelistv5 – Published: 2026-05-01 14:14 – Updated: 2026-07-04 11:50
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe , < 3cf0580a09d417eab41ce914a11f9cde3a121871 (git)
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: 5.10.260 , ≤ 5.10.* (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)
guessed Create a notification for this product.
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                "baseScore": 5.5,
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                "confidentialityImpact": "NONE",
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        "published": "2026-05-01T15:16:38.460",
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            "url": "https://git.kernel.org/stable/c/7f6f127b9bc34bed35f56faf7ecb1561d6b39000"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d61446dfc9d387775bb1b95b081953201b9222af"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:28:00+00:00",
      "cve": "CVE-2026-31755",
      "id": "CVE-2026-31755",
      "initial_release_date": "2026-05-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31755.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T01:27:12Z",
      "cve": "CVE-2026-31755",
      "id": "CVE-2026-31755",
      "initial_release_date": "2026-05-06T01:43:05Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "472",
      "product_status:known_not_affected": "114",
      "product_status:recommended": "265",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-31755",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31755.json",
      "version": "8"
    }
  }
}



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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.