{
  "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-2026-53043",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53043",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-24T16:29:49.480Z",
    "updatedAt": "2026-08-05T12:32:50.728Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "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": "ocfs2/dlm: validate qr_numregions in dlm_match_regions()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2/dlm: validate qr_numregions in dlm_match_regions()\n\nPatch series \"ocfs2/dlm: fix two bugs in dlm_match_regions()\".\n\nIn dlm_match_regions(), the qr_numregions field from a DLM_QUERY_REGION\nnetwork message is used to drive loops over the qr_regions buffer without\nsufficient validation.  This series fixes two issues:\n\n- Patch 1 adds a bounds check to reject messages where qr_numregions\n  exceeds O2NM_MAX_REGIONS. The o2net layer only validates message\n  byte length; it does not constrain field values, so a crafted message\n  can set qr_numregions up to 255 and trigger out-of-bounds reads past\n  the 1024-byte qr_regions buffer.\n\n- Patch 2 fixes an off-by-one in the local-vs-remote comparison loop,\n  which uses '<=' instead of '<', reading one entry past the valid range\n  even when qr_numregions is within bounds.\n\n\nThis patch (of 2):\n\nThe qr_numregions field from a DLM_QUERY_REGION network message is used\ndirectly as loop bounds in dlm_match_regions() without checking against\nO2NM_MAX_REGIONS.  Since qr_regions is sized for at most O2NM_MAX_REGIONS\n(32) entries, a crafted message with qr_numregions > 32 causes\nout-of-bounds reads past the qr_regions buffer.\n\nAdd a bounds check for qr_numregions before entering the loops.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d3d5efade0c79dac1cac98c0cb1115432f804439"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f69551139caf6d24242a0ad049ee46b264e3aee0"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1f8b91275912cd428289c1fb424bebd7ff5302bd"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f37de46149db49abd2b24f4f0c5a88cf4dfb5f47"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6c6e8fc3c007319981647b410c29bb5775048551"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3f474c33ebc2e2ca3fcb587d7de4375348f13373"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c2d0de23ae4be22b6c18e8f0915be74d3b5fb21"
            },
            {
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ab3fbb01bc6d79091bc375e5235d360cd9b78be"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.37",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.37"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.141",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.91",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.33",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}