{
  "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-2025-39999",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39999",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-15T07:58:23.038Z",
    "updatedAt": "2026-05-23T16:01:13.466Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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-mq: fix blk_mq_tags double free while nr_requests grown",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: fix blk_mq_tags double free while nr_requests grown\n\nIn the case user trigger tags grow by queue sysfs attribute nr_requests,\nhctx->sched_tags will be freed directly and replaced with a new\nallocated tags, see blk_mq_tag_update_depth().\n\nThe problem is that hctx->sched_tags is from elevator->et->tags, while\net->tags is still the freed tags, hence later elevator exit will try to\nfree the tags again, causing kernel panic.\n\nFix this problem by replacing et->tags with new allocated tags as well.\n\nNoted there are still some long term problems that will require some\nrefactor to be fixed thoroughly[1].\n\n[1] https://lore.kernel.org/all/20250815080216.410665-1-yukuai1@huaweicloud.com/",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "58567d8e95c096ad234963df90a2ca518901f4b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8faee580d63bc2a54a59dcdb7f9ce4de29384fec"
            },
            {
              "version": "f5a6604f7a4405450e4a1f54e5430f47290c500f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "392b1d64911f4de8887fe8b68299fa8bd6e5b923"
            },
            {
              "version": "f5a6604f7a4405450e4a1f54e5430f47290c500f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ba28afbd9eff2a6370f23ef4e6a036ab0cfda409"
            },
            {
              "version": "6.16.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.16.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.17",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.17"
            },
            {
              "version": "6.16.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}