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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 '<=' instead of '<',\ncausing it to read one entry past the valid range of qr_regions.  The\nother loops in the same function correctly use '<'.\n\nFix the loop condition to use '<' for consistency and correctness."}],"metrics":[{"cvssV3_1":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-28T06:41:30.026Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"},{"url":"https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"},{"url":"https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845"},{"url":"https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54"},{"url":"https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073"},{"url":"https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4"},{"url":"https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520"},{"url":"https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b"}],"title":"ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53309","datePublished":"2026-06-26T19:41:03.505Z","dateReserved":"2026-06-09T07:44:35.397Z","dateUpdated":"2026-06-28T06:41:30.026Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-26 20:17:24","lastModifiedDate":"2026-06-28 08:16:43","problem_types":[],"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}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53309","Ordinal":"1","Title":"ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparis","CVE":"CVE-2026-53309","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53309","Ordinal":"1","NoteData":"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 '<=' instead of '<',\ncausing it to read one entry past the valid range of qr_regions.  The\nother loops in the same function correctly use '<'.\n\nFix the loop condition to use '<' for consistency and correctness.","Type":"Description","Title":"ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparis"}]}}}