{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53309: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53309","status":"final","version":"1","initial_release_date":"2026-06-26T19:41:03.505Z","current_release_date":"2026-06-28T06:41:30.026Z","revision_history":[{"date":"2026-06-26T19:41:03.505Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53309 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53309"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53309"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b"}]},"product_tree":{"branches":[{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <760ab35040aca8399021fdb9ff1db1089feb7194","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <760ab35040aca8399021fdb9ff1db1089feb7194","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <c60a2710b73838d250cda57344c049b89abc5d52","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <c60a2710b73838d250cda57344c049b89abc5d52","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <2a0673836f019e7c032acbf48d022d5ccf02a845","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <2a0673836f019e7c032acbf48d022d5ccf02a845","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <819d8ebad3200a53de99bd7e297bc428e41ced54","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <819d8ebad3200a53de99bd7e297bc428e41ced54","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <d5403ae28085761d58b555645bc7d5feadb10073","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <d5403ae28085761d58b555645bc7d5feadb10073","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <1fb7f356547d9688822315cd2b205ff0bd5429b4","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <1fb7f356547d9688822315cd2b205ff0bd5429b4","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <426cd8eedac89b86148d4478990eeef16e8a2520","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <426cd8eedac89b86148d4478990eeef16e8a2520","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=ea2034416b54700e30371f2ad6517cbb94674083 <01b61e8dda9b0fdb0d4cda43de25f4e390554d7b","product":{"name":"Linux Linux >=ea2034416b54700e30371f2ad6517cbb94674083 <01b61e8dda9b0fdb0d4cda43de25f4e390554d7b","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version","name":"2.6.37","product":{"name":"Linux Linux 2.6.37","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"0","product":{"name":"Linux Linux 0","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.10.258","product":{"name":"Linux Linux 5.10.258","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.15.209","product":{"name":"Linux Linux 5.15.209","product_id":"CSAFPID-12","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.1.175","product":{"name":"Linux Linux 6.1.175","product_id":"CSAFPID-13","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.6.141","product":{"name":"Linux Linux 6.6.141","product_id":"CSAFPID-14","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.12.91","product":{"name":"Linux Linux 6.12.91","product_id":"CSAFPID-15","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.18.33","product":{"name":"Linux Linux 6.18.33","product_id":"CSAFPID-16","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.0.10","product":{"name":"Linux Linux 7.0.10","product_id":"CSAFPID-17","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.1","product":{"name":"Linux Linux 7.1","product_id":"CSAFPID-18","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:2.6.37:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53309","title":"ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"],"fixed":["CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14","CSAFPID-15","CSAFPID-16","CSAFPID-17","CSAFPID-18"]},"scores":[{"cvss_v3":{"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"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 0, 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b, 1fb7f356547d9688822315cd2b205ff0bd5429b4, 2a0673836f019e7c032acbf48d022d5ccf02a845, 426cd8eedac89b86148d4478990eeef16e8a2520, 5.10.258, 5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10, 7.1, 760ab35040aca8399021fdb9ff1db1089feb7194, 819d8ebad3200a53de99bd7e297bc428e41ced54, c60a2710b73838d250cda57344c049b89abc5d52, d5403ae28085761d58b555645bc7d5feadb10073.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9"]}]}]}