FKIE_CVE-2026-53309

Vulnerability from fkie_nvd - Published: 2026-06-26 20:17 - Updated: 2026-06-30 14:44
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qr_regions. The other loops in the same function correctly use '<'. Fix the loop condition to use '<' for consistency and correctness.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/dlm/dlmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "760ab35040aca8399021fdb9ff1db1089feb7194",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "c60a2710b73838d250cda57344c049b89abc5d52",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "2a0673836f019e7c032acbf48d022d5ccf02a845",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "819d8ebad3200a53de99bd7e297bc428e41ced54",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "d5403ae28085761d58b555645bc7d5feadb10073",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "1fb7f356547d9688822315cd2b205ff0bd5429b4",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "426cd8eedac89b86148d4478990eeef16e8a2520",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            },
            {
              "lessThan": "01b61e8dda9b0fdb0d4cda43de25f4e390554d7b",
              "status": "affected",
              "version": "ea2034416b54700e30371f2ad6517cbb94674083",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/dlm/dlmdomain.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.37"
            },
            {
              "lessThan": "2.6.37",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison\n\nThe local-vs-remote region comparison loop uses \u0027\u003c=\u0027 instead of \u0027\u003c\u0027,\ncausing it to read one entry past the valid range of qr_regions.  The\nother loops in the same function correctly use \u0027\u003c\u0027.\n\nFix the loop condition to use \u0027\u003c\u0027 for consistency and correctness."
    }
  ],
  "id": "CVE-2026-53309",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-26T20:17:24.203",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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