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

Vulnerability from cvelistv5 – Published: 2026-06-26 19:41 – Updated: 2026-08-05 12:34
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-193"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-13T05:50:22+00:00",
      "cve": "CVE-2026-53309",
      "id": "CVE-2026-53309",
      "initial_release_date": "2026-06-26T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53309.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:51:26Z",
      "cve": "CVE-2026-53309",
      "id": "CVE-2026-53309",
      "initial_release_date": "2026-06-28T01:08:47Z",
      "product_status:first_fixed": "23",
      "product_status:known_affected": "749",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53309",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53309.json",
      "version": "12"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.