usb: core: Prevent null pointer dereference in update_port_device_state

{
  "id": "8181e98b9cfea0daf1fb3f609e4cbb5f32b30f32a98cbd90e3cba37aece5b5ae",
  "url": "https://osv.dev/vulnerability/CVE-2024-26716",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: core: Prevent null pointer dereference in update_port_device_state",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: core: Prevent null pointer dereference in update_port_device_state Currently, the function update_port_device_state gets the usb_hub from udev->parent by calling usb_hub_to_struct_hub. However, in case the actconfig or the maxchild is 0, the usb_hub would be NULL and upon further accessing to get port_dev would result in null pointer dereference. Fix this by introducing an if check after the usb_hub is populated.",
    "evidence": "osv:CVE-2024-26716",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-26716",
      "aliases": [
        "CVE-2024-26716"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "83cb2604f641cecadc275ca18adbba4bf262320f"
                },
                {
                  "fixed": "ed85777c640cf9e6920bb1b60ed8cd48e1f4d873"
                },
                {
                  "fixed": "465b545d1d7ef282192ddd4439b08279bdb13f6f"
                },
                {
                  "fixed": "12783c0b9e2c7915a50d5ec829630ff2da50472c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26716.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.18"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.7.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26716.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.970404177Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/12783c0b9e2c7915a50d5ec829630ff2da50472c",
        "https://git.kernel.org/stable/c/465b545d1d7ef282192ddd4439b08279bdb13f6f",
        "https://git.kernel.org/stable/c/ed85777c640cf9e6920bb1b60ed8cd48e1f4d873",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26716.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26716",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26716.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26716",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 516783,
  "published_at": "2024-04-03T14:55:17.305+00:00"
}