{
  "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-2025-21712",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21712",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-27T02:07:24.354Z",
    "updatedAt": "2026-10-15T21:51:52.411Z",
    "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": "md/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/md-bitmap: Synchronize bitmap_get_stats() with bitmap lifetime\n\nAfter commit ec6bb299c7c3 (\"md/md-bitmap: add 'sync_size' into struct\nmd_bitmap_stats\"), following panic is reported:\n\nOops: general protection fault, probably for non-canonical address\nRIP: 0010:bitmap_get_stats+0x2b/0xa0\nCall Trace:\n <TASK>\n md_seq_show+0x2d2/0x5b0\n seq_read_iter+0x2b9/0x470\n seq_read+0x12f/0x180\n proc_reg_read+0x57/0xb0\n vfs_read+0xf6/0x380\n ksys_read+0x6c/0xf0\n do_syscall_64+0x82/0x170\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nRoot cause is that bitmap_get_stats() can be called at anytime if mddev\nis still there, even if bitmap is destroyed, or not fully initialized.\nDeferenceing bitmap in this case can crash the kernel. Meanwhile, the\nabove commit start to deferencing bitmap->storage, make the problem\neasier to trigger.\n\nFix the problem by protecting bitmap_get_stats() with bitmap_info.mutex.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eb2f9d98cd3e94a79fbf8fb90637c5b12e805428"
            },
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "032fa54f486eac5507976e7e31f079a767bc13a8"
            },
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "52848a095b55a302af92f52ca0de5b3112059bb8"
            },
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "237e19519c8ff6949f0ef57c4a0243f5b2b0fa18"
            },
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4e9316eee3885bfb311b4759513f2ccf37891c09"
            },
            {
              "version": "32a7627cf3a35396a8e834faf34e38ae9f3b1309",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d28d0ddb986f56920ac97ae704cc3340a699a30"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.13"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.130",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.13",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}