virtio-net: zero unused hash fields

{
  "id": "b9416a4627e89fa07fab0fd0ead0a5a15df1f252249061b6c676ecc937f55dc1",
  "url": "https://osv.dev/vulnerability/CVE-2025-40236",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "virtio-net: zero unused hash fields",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: virtio-net: zero unused hash fields When GSO tunnel is negotiated virtio_net_hdr_tnl_from_skb() tries to initialize the tunnel metadata but forget to zero unused rxhash fields. This may leak information to another side. Fixing this by zeroing the unused hash fields.",
    "evidence": "osv:CVE-2025-40236",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.17.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-40236",
      "aliases": [
        "CVE-2025-40236"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a2fb4bc4e2a6a031683910d85b278c1d25ae5420"
                },
                {
                  "fixed": "b625d231c66a6041e98817ffc944bf6e4c45b2e3"
                },
                {
                  "fixed": "b2284768c6b32aa224ca7d0ef0741beb434f03aa"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40236.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.17.0"
                },
                {
                  "fixed": "6.17.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40236.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:44.512847790Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/b2284768c6b32aa224ca7d0ef0741beb434f03aa",
        "https://git.kernel.org/stable/c/b625d231c66a6041e98817ffc944bf6e4c45b2e3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40236.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40236",
        "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/2025/40xxx/CVE-2025-40236.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-40236",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 512497,
  "published_at": "2025-12-04T15:31:26.497+00:00"
}