ksmbd: fix Preauh_HashValue race condition

{
  "id": "906eab4bc7e20758307c6670f5ff344c7707aed0f73c56926981f9860062fa50",
  "url": "https://osv.dev/vulnerability/CVE-2025-38561",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ksmbd: fix Preauh_HashValue race condition",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix Preauh_HashValue race condition If client send multiple session setup requests to ksmbd, Preauh_HashValue race condition could happen. There is no need to free sess->Preauh_HashValue at session setup phase. It can be freed together with session at connection termination phase.",
    "evidence": "osv:CVE-2025-38561",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.148",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.102",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.10",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.16.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2025-38561",
      "aliases": [
        "CVE-2025-38561"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "0626e6641f6b467447c81dd7678a69c66f7746cf"
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                {
                  "fixed": "fbf5c0845ed15122a770bca9be1d9b60b470d3aa"
                },
                {
                  "fixed": "b69fd87076daa66f3d186bd421a7b0ee0cb45829"
                },
                {
                  "fixed": "edeecc7871e8fc0878d53ce286c75040a0e38f6c"
                },
                {
                  "fixed": "7d7c0c5304c88bcbd7a85e9bcd61d27e998ba5fc"
                },
                {
                  "fixed": "6613887da1d18dd2ecfd6c6148a873c4d903ebdc"
                },
                {
                  "fixed": "44a3059c4c8cc635a1fb2afd692d0730ca1ba4b6"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38561.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.15.0"
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                {
                  "fixed": "6.1.148"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
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                {
                  "fixed": "6.6.102"
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              ]
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.42"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                  "fixed": "6.15.10"
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                  "introduced": "6.16.0"
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                {
                  "fixed": "6.16.1"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38561.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:47.967940646Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/44a3059c4c8cc635a1fb2afd692d0730ca1ba4b6",
        "https://git.kernel.org/stable/c/6613887da1d18dd2ecfd6c6148a873c4d903ebdc",
        "https://git.kernel.org/stable/c/7d7c0c5304c88bcbd7a85e9bcd61d27e998ba5fc",
        "https://git.kernel.org/stable/c/b69fd87076daa66f3d186bd421a7b0ee0cb45829",
        "https://git.kernel.org/stable/c/edeecc7871e8fc0878d53ce286c75040a0e38f6c",
        "https://git.kernel.org/stable/c/fbf5c0845ed15122a770bca9be1d9b60b470d3aa",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38561.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38561",
        "https://www.zerodayinitiative.com/advisories/ZDI-25-916/",
        "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/2025/38xxx/CVE-2025-38561.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38561",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 515890,
  "published_at": "2025-08-19T17:02:38.719+00:00"
}