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).

Which products are affected by CVE-2026-53309?

CVE-2026-53309 affects 1 product, including: azl3 kernel 6.6.139.1-1 on Azure Linux 3.0.

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

—

🔗 CVE IDs covered (1)

CVE-2026-53309 →

🎯 Affected products1

azl3 kernel 6.6.139.1-1 on Azure Linux 3.0

🔗 References (1)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53309