{
  "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-2025-40125",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40125",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-11-12T10:23:20.180Z",
    "updatedAt": "2026-05-11T21:43:15.313Z",
    "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: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: check kobject state_in_sysfs before deleting in blk_mq_unregister_hctx\n\nIn __blk_mq_update_nr_hw_queues() the return value of\nblk_mq_sysfs_register_hctxs() is not checked. If sysfs creation for hctx\nfails, later changing the number of hw_queues or removing disk will\ntrigger the following warning:\n\n  kernfs: can not remove 'nr_tags', no directory\n  WARNING: CPU: 2 PID: 637 at fs/kernfs/dir.c:1707 kernfs_remove_by_name_ns+0x13f/0x160\n  Call Trace:\n   remove_files.isra.1+0x38/0xb0\n   sysfs_remove_group+0x4d/0x100\n   sysfs_remove_groups+0x31/0x60\n   __kobject_del+0x23/0xf0\n   kobject_del+0x17/0x40\n   blk_mq_unregister_hctx+0x5d/0x80\n   blk_mq_sysfs_unregister_hctxs+0x94/0xd0\n   blk_mq_update_nr_hw_queues+0x124/0x760\n   nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\n   nullb_device_submit_queues_store+0x92/0x120 [null_blk]\n\nkobjct_del() was called unconditionally even if sysfs creation failed.\nFix it by checkig the kobject creation statusbefore deleting it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a8c53553f1833cc2d14175d2d72cf37193a01898"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cc14ea21c4e658814d737ed4dedde6cd626a15ad"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4b97e99b87a773d52699521d40864f3ec888e9a6"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6e7dadc5763c48eb3b9b91265a21f312599ebb2c"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "06c4826b1d900611096e4621e93133db57e13911"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "babc634e9fe2803962dba98a07587e835dbc0731"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d5ddd76ee52bdc16e9f8b1e7791291e785dab032"
            },
            {
              "version": "477e19dedc9d3e1f4443a1d4ae00572a988120ea",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4c7ef92f6d4d08a27d676e4c348f4e2922cab3ed"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.20",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.4.301",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.195",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.156",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.112",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}