ksmbd: fix out-of-bound read in smb2_write

{
  "id": "894e9cf932dbc6a25f4ed91a43824d65543567b3f4a2d1276c9ea8ddfd12b333",
  "url": "https://osv.dev/vulnerability/CVE-2023-3865",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ksmbd: fix out-of-bound read in smb2_write",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bound read in smb2_write ksmbd_smb2_check_message doesn't validate hdr->NextCommand. If ->NextCommand is bigger than Offset + Length of smb2 write, It will allow oversized smb2 write length. It will cause OOB read in smb2_write.",
    "evidence": "osv:CVE-2023-3865",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.121",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.36",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.3.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-3865",
      "aliases": [
        "CVE-2023-3865"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/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": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"
                },
                {
                  "fixed": "3813eee5154d6a4c5875cb4444cb2b63bac8947f"
                },
                {
                  "fixed": "c86211159bc3178b891e0d60e586a32c7b6a231b"
                },
                {
                  "fixed": "58a9c41064df27632e780c5a3ae3e0e4284957d1"
                },
                {
                  "fixed": "5fe7f7b78290638806211046a99f031ff26164e1"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3865.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
                },
                {
                  "fixed": "5.15.121"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.36"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.3.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3865.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.331515529Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3813eee5154d6a4c5875cb4444cb2b63bac8947f",
        "https://git.kernel.org/stable/c/58a9c41064df27632e780c5a3ae3e0e4284957d1",
        "https://git.kernel.org/stable/c/5fe7f7b78290638806211046a99f031ff26164e1",
        "https://git.kernel.org/stable/c/c86211159bc3178b891e0d60e586a32c7b6a231b",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3865.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-3865",
        "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/2023/3xxx/CVE-2023-3865.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-3865",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508804,
  "published_at": "2025-08-16T13:27:56.403+00:00"
}