{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ea2034416b54700e30371f2ad6517cbb94674083"
            },
            {
              "fixed": "760ab35040aca8399021fdb9ff1db1089feb7194"
            },
            {
              "fixed": "c60a2710b73838d250cda57344c049b89abc5d52"
            },
            {
              "fixed": "2a0673836f019e7c032acbf48d022d5ccf02a845"
            },
            {
              "fixed": "819d8ebad3200a53de99bd7e297bc428e41ced54"
            },
            {
              "fixed": "d5403ae28085761d58b555645bc7d5feadb10073"
            },
            {
              "fixed": "1fb7f356547d9688822315cd2b205ff0bd5429b4"
            },
            {
              "fixed": "426cd8eedac89b86148d4478990eeef16e8a2520"
            },
            {
              "fixed": "01b61e8dda9b0fdb0d4cda43de25f4e390554d7b"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.37"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53309.json"
  },
  "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 '\u003c=' instead of '\u003c',\ncausing it to read one entry past the valid range of qr_regions.  The\nother loops in the same function correctly use '\u003c'.\n\nFix the loop condition to use '\u003c' for consistency and correctness.",
  "id": "CVE-2026-53309",
  "modified": "2026-07-08T05:37:06.852032299Z",
  "published": "2026-06-26T19:41:03.505Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53309.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53309"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison"
}