usbnet: ipheth: fix possible overflow in DPE length check

{
  "id": "ea327f303e1f5de877089630b5b69c6d56603e66c5487f15e3e5fd39a45e733f",
  "url": "https://osv.dev/vulnerability/CVE-2025-21743",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usbnet: ipheth: fix possible overflow in DPE length check",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usbnet: ipheth: fix possible overflow in DPE length check Originally, it was possible for the DPE length check to overflow if wDatagramIndex + wDatagramLength > U16_MAX. This could lead to an OoB read. Move the wDatagramIndex term to the other side of the inequality. An existing condition ensures that wDatagramIndex < urb->actual_length.",
    "evidence": "osv:CVE-2025-21743",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.78",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-21743",
      "aliases": [
        "CVE-2025-21743"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a2d274c62e44b1995c170595db3865c6fe701226"
                },
                {
                  "fixed": "18bf6f5cce3172cb303c3f0551aa9443d5ed74f8"
                },
                {
                  "fixed": "d677e7dd59ad6837496f5a02d8e5d39824278dfd"
                },
                {
                  "fixed": "d824a964185910e317287f034c0a439c08b4fe49"
                },
                {
                  "fixed": "c219427ed296f94bb4b91d08626776dc7719ee27"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21743.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.6.78"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.14"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21743.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.681438272Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/18bf6f5cce3172cb303c3f0551aa9443d5ed74f8",
        "https://git.kernel.org/stable/c/c219427ed296f94bb4b91d08626776dc7719ee27",
        "https://git.kernel.org/stable/c/d677e7dd59ad6837496f5a02d8e5d39824278dfd",
        "https://git.kernel.org/stable/c/d824a964185910e317287f034c0a439c08b4fe49",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21743.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21743",
        "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/2025/21xxx/CVE-2025-21743.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21743",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490821,
  "published_at": "2025-02-27T02:12:16.696+00:00"
}