Vulnerability-Lookup

CVE-2026-53309 (GCVE-0-2026-53309)

Vulnerability from cvelistv5 – Published: 2026-06-26 19:41 – Updated: 2026-06-28 06:41

Title

ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

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.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/760ab35040aca8399…
https://git.kernel.org/stable/c/c60a2710b73838d25…
https://git.kernel.org/stable/c/2a0673836f019e7c0…
https://git.kernel.org/stable/c/819d8ebad3200a53d…
https://git.kernel.org/stable/c/d5403ae28085761d5…
https://git.kernel.org/stable/c/1fb7f356547d96888…
https://git.kernel.org/stable/c/426cd8eedac89b861…
https://git.kernel.org/stable/c/01b61e8dda9b0fdb0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 760ab35040aca8399021fdb9ff1db1089feb7194 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < c60a2710b73838d250cda57344c049b89abc5d52 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 2a0673836f019e7c032acbf48d022d5ccf02a845 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 819d8ebad3200a53de99bd7e297bc428e41ced54 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < d5403ae28085761d58b555645bc7d5feadb10073 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 1fb7f356547d9688822315cd2b205ff0bd5429b4 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 426cd8eedac89b86148d4478990eeef16e8a2520 (git) Affected: ea2034416b54700e30371f2ad6517cbb94674083 , < 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b (git)
Linux	Linux	Affected: 2.6.37 Unaffected: 0 , < 2.6.37 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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JSON

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    "datePublished": "2026-06-26T19:41:03.505Z",
    "dateReserved": "2026-06-09T07:44:35.397Z",
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ocfs2/dlm/dlmdomain.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"760ab35040aca8399021fdb9ff1db1089feb7194\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"c60a2710b73838d250cda57344c049b89abc5d52\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"2a0673836f019e7c032acbf48d022d5ccf02a845\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"819d8ebad3200a53de99bd7e297bc428e41ced54\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"d5403ae28085761d58b555645bc7d5feadb10073\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"1fb7f356547d9688822315cd2b205ff0bd5429b4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"426cd8eedac89b86148d4478990eeef16e8a2520\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea2034416b54700e30371f2ad6517cbb94674083\",\"lessThan\":\"01b61e8dda9b0fdb0d4cda43de25f4e390554d7b\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ocfs2/dlm/dlmdomain.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.37\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.37\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.141\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.91\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}

GHSA-CJH6-575G-258G

Vulnerability from github – Published: 2026-06-26 21:32 – Updated: 2026-06-28 09:31

Details

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.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-53309"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-26T20:17:24Z",
    "severity": "CRITICAL"
  },
  "details": "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": "GHSA-cjh6-575g-258g",
  "modified": "2026-06-28T09:31:48Z",
  "published": "2026-06-26T21:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53309"
    },
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    },
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      "url": "https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"
    },
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    },
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      "url": "https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"
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  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

MSRC_CVE-2026-53309

Vulnerability from csaf_microsoft - Published: 2026-06-02 00:00 - Updated: 2026-06-28 01:02

Summary

ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-53309

Affected products

Under investigation 1 product

Product	Identifier	Version	Remediation
Unresolved product id: 17084-1		—

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-53309 ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53309.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison",
    "tracking": {
      "current_release_date": "2026-06-28T01:02:42.000Z",
      "generator": {
        "date": "2026-06-28T07:10:57.325Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-53309",
      "initial_release_date": "2026-06-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-06-28T01:02:42.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-53309",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-53309 ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-53309.json"
        }
      ],
      "title": "ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-53309 (GCVE-0-2026-53309)

GHSA-CJH6-575G-258G

MSRC_CVE-2026-53309

Tags

Sightings

Nomenclature