btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()

{
  "id": "36fdf3155567e637014e6ff7ee22e4568898c5b68bf8fd80de0564b720a7db1a",
  "url": "https://osv.dev/vulnerability/CVE-2025-39800",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: btrfs: abort transaction on unexpected eb generation at btrfs_copy_root() If we find an unexpected generation for the extent buffer we are cloning at btrfs_copy_root(), we just WARN_ON() and don't error out and abort the transaction, meaning we allow to persist metadata with an unexpected generation. Instead of warning only, abort the transaction and return -EUCLEAN.",
    "evidence": "osv:CVE-2025-39800",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.149",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.103",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.16.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-39800",
      "aliases": [
        "CVE-2025-39800"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "4290e34fb87ae556b12c216efd0ae91583446b7a"
                },
                {
                  "fixed": "4734255ef39b416864139dcda96a387fe5f33a6a"
                },
                {
                  "fixed": "da2124719f386b6e5d4d4b1a2e67c440e4d5892f"
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                {
                  "fixed": "f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3"
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                {
                  "fixed": "33e8f24b52d2796b8cfb28c19a1a7dd6476323a8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39800.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.29"
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                {
                  "fixed": "6.1.149"
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              ]
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
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                {
                  "fixed": "6.6.103"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.13.0"
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                  "fixed": "6.16.4"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39800.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.829463626Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-032379.html",
        "https://git.kernel.org/stable/c/33e8f24b52d2796b8cfb28c19a1a7dd6476323a8",
        "https://git.kernel.org/stable/c/4290e34fb87ae556b12c216efd0ae91583446b7a",
        "https://git.kernel.org/stable/c/4734255ef39b416864139dcda96a387fe5f33a6a",
        "https://git.kernel.org/stable/c/da2124719f386b6e5d4d4b1a2e67c440e4d5892f",
        "https://git.kernel.org/stable/c/f4f5bd9251a4cbe55aaa05725c6c3c32ad1f74b3",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39800.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-39800",
        "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/2025/39xxx/CVE-2025-39800.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-39800",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504350,
  "published_at": "2025-09-15T12:36:43.043+00:00"
}