What is CVE-2026-53309?

CVE-2026-53309 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

Which CVE IDs does CVE-2026-53309 cover?

CVE-2026-53309 covers the following CVE IDs: CVE-2026-53309. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-53309?

CVE-2026-53309 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

CVE-2026-53309CriticalCVSS 9.8

ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-53309 →