usb: gadget: u_serial: Add null pointer check in gserial_resume

{
  "id": "7e56ea5b7644cfc37a7ab1d86fc7ac131d970c1265f5a4291fb59750ec72e930",
  "url": "https://osv.dev/vulnerability/CVE-2023-53551",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: gadget: u_serial: Add null pointer check in gserial_resume",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_serial: Add null pointer check in gserial_resume Consider a case where gserial_disconnect has already cleared gser->ioport. And if a wakeup interrupt triggers afterwards, gserial_resume gets called, which will lead to accessing of gser->ioport and thus causing null pointer dereference.Add a null pointer check to prevent this. Added a static spinlock to prevent gser->ioport from becoming null after the newly added check.",
    "evidence": "osv:CVE-2023-53551",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.171",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.97",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.15",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.2.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-53551",
      "aliases": [
        "CVE-2023-53551"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "aba3a8d01d623a5efef48ab8e78752d58d4c90c3"
                },
                {
                  "fixed": "c5360eec648bd506afa304ae4a71f82e13d41897"
                },
                {
                  "fixed": "3b24c980dc07be4550a9d1450ed7057f882530e5"
                },
                {
                  "fixed": "ec357cd3e8af614855d286dd378725cdc7264df6"
                },
                {
                  "fixed": "44e004f757a7ae13dfebaadbcfdb1a6f98c10377"
                },
                {
                  "fixed": "5ec63fdbca604568890c577753c6f66c5b3ef0b5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53551.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.8.0"
                },
                {
                  "fixed": "5.10.171"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.97"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.15"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.2.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53551.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.533580428Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3b24c980dc07be4550a9d1450ed7057f882530e5",
        "https://git.kernel.org/stable/c/44e004f757a7ae13dfebaadbcfdb1a6f98c10377",
        "https://git.kernel.org/stable/c/5ec63fdbca604568890c577753c6f66c5b3ef0b5",
        "https://git.kernel.org/stable/c/c5360eec648bd506afa304ae4a71f82e13d41897",
        "https://git.kernel.org/stable/c/ec357cd3e8af614855d286dd378725cdc7264df6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53551.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53551",
        "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/2023/53xxx/CVE-2023-53551.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53551",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490822,
  "published_at": "2025-10-04T15:16:57.736+00:00"
}