{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-21745",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21745",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-27T02:12:17.853Z",
    "updatedAt": "2026-10-15T01:03:57.276Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "blk-cgroup: Fix class @block_class's subsystem refcount leakage",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: Fix class @block_class's subsystem refcount leakage\n\nblkcg_fill_root_iostats() iterates over @block_class's devices by\nclass_dev_iter_(init|next)(), but does not end iterating with\nclass_dev_iter_exit(), so causes the class's subsystem refcount leakage.\n\nFix by ending the iterating with class_dev_iter_exit().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ffb494f1e7a047bd7a41b13796fcfb08fe5beafb"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "38287f779b34dfe959b4b681e909f2d3d52b88be"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "431b6ef2714be4d5babb802114987541a88b43b0"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "993121481b5a87829f1e8163f47158b72679f309"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2ce09aabe009453d641a2ceb79e6461a2d4f3876"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "67c7f213e052b1aa6caba4a7e25e303bc6997126"
            },
            {
              "version": "ef45fe470e1e5410db4af87abc5d5055427945ac",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d1248436cbef1f924c04255367ff4845ccd9025e"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.10.235",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.179",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.129",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.78",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.14",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}