{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53309", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.397Z", "datePublished": "2026-06-26T19:41:03.505Z", "dateUpdated": "2026-06-28T06:41:30.026Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-28T06:41:30.026Z"}, "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"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"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/dlm/dlmdomain.c"], "versions": [{"version": "ea2034416b54700e30371f2ad6517cbb94674083", "lessThan": "760ab35040aca8399021fdb9ff1db1089feb7194", "status": "affected", "versionType": "git"}, {"version": "ea2034416b54700e30371f2ad6517cbb94674083", "lessThan": "c60a2710b73838d250cda57344c049b89abc5d52", "status": "affected", "versionType": "git"}, {"version": "ea2034416b54700e30371f2ad6517cbb94674083", "lessThan": "2a0673836f019e7c032acbf48d022d5ccf02a845", "status": "affected", "versionType": "git"}, {"version": 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{"bugzilla": {"description": "kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison", "id": "2493755", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2493755"}, "csaw": false, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's OCFS2 Distributed Lock Manager (DLM) component. An off-by-one error in the `dlm_match_regions()` function's region comparison loop causes it to read beyond the valid memory range of `qr_regions`. This out-of-bounds read could lead to system instability or crashes."], "name": "CVE-2026-53309", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53309\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53309\nhttps://lore.kernel.org/linux-cve-announce/2026062620-CVE-2026-53309-794d@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,760ab35040aca8399021fdb9ff1db1089feb7194)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,c60a2710b73838d250cda57344c049b89abc5d52)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,2a0673836f019e7c032acbf48d022d5ccf02a845)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,819d8ebad3200a53de99bd7e297bc428e41ced54)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,d5403ae28085761d58b555645bc7d5feadb10073)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,1fb7f356547d9688822315cd2b205ff0bd5429b4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,426cd8eedac89b86148d4478990eeef16e8a2520)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ea2034416b54700e30371f2ad6517cbb94674083,01b61e8dda9b0fdb0d4cda43de25f4e390554d7b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.37"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.37)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.141,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.10,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.91,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.33,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.10,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-26T22:15:06.967145+00:00", "updated": "2026-06-28T15:15:05.982026+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125", "CWE-119", "CWE-20"]}