GHSA-CJH6-575G-258G

Vulnerability from github – Published: 2026-06-26 21:32 – Updated: 2026-06-28 09:31
VLAI
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
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{
  "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"
    },
    {
      "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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