can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header

{
  "id": "5873db1da6a657a0e4c91bdfda49c71d3cc333ab89b32d4f7b1f02ed08f5fa99",
  "url": "https://osv.dev/vulnerability/CVE-2025-68343",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header The driver expects to receive a struct gs_host_frame in gs_usb_receive_bulk_callback(). Use struct_group to describe the header of the struct gs_host_frame and check that we have at least received the header before accessing any members of it. To resubmit the URB, do not dereference the pointer chain \"dev->parent->hf_size_rx\" but use \"parent->hf_size_rx\" instead. Since \"urb->context\" contains \"parent\", it is always defined, while \"dev\" is not defined if the URB it too short.",
    "evidence": "osv:CVE-2025-68343",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.159",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.119",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.61",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68343",
      "aliases": [
        "CVE-2025-68343"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d08e973a77d128b25e01a08c34d89593fdf222da"
                },
                {
                  "fixed": "18cbce43363c9f84b90a92d57df341155eee0697"
                },
                {
                  "fixed": "3433680b759646efcacc64fe36aa2e51ae34b8f0"
                },
                {
                  "fixed": "616eee3e895b8ca0028163fcb1dce5e3e9dea322"
                },
                {
                  "fixed": "f31693dc3a584c0ad3937e857b59dbc1a7ed2b87"
                },
                {
                  "fixed": "6fe9f3279f7d2518439a7962c5870c6e9ecbadcf"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68343.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.16.0"
                },
                {
                  "fixed": "6.1.159"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.119"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.61"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.17.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68343.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.771076699Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/18cbce43363c9f84b90a92d57df341155eee0697",
        "https://git.kernel.org/stable/c/3433680b759646efcacc64fe36aa2e51ae34b8f0",
        "https://git.kernel.org/stable/c/616eee3e895b8ca0028163fcb1dce5e3e9dea322",
        "https://git.kernel.org/stable/c/6fe9f3279f7d2518439a7962c5870c6e9ecbadcf",
        "https://git.kernel.org/stable/c/f31693dc3a584c0ad3937e857b59dbc1a7ed2b87",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68343.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68343",
        "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/2025/68xxx/CVE-2025-68343.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68343",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 511610,
  "published_at": "2025-12-23T13:58:28.411+00:00"
}