CVE-2026-53309

CriticalCVSS 9.8/10Last modified Jul 6, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

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

The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qr_regions. The other loops in the same function correctly use '<'.

Fix the loop condition to use '<' for consistency and correctness.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-193

Affected software

VendorProductVersions
LinuxLinux>= ea2034416b54700e30371f2ad6517cbb94674083, < 760ab35040aca8399021fdb9ff1db1089feb7194; >= ea2034416b54700e30371f2ad6517cbb94674083, < c60a2710b73838d250cda57344c049b89abc5d52; >= ea2034416b54700e30371f2ad6517cbb94674083, < 2a0673836f019e7c032acbf48d022d5ccf02a845; >= ea2034416b54700e30371f2ad6517cbb94674083, < 819d8ebad3200a53de99bd7e297bc428e41ced54; >= ea2034416b54700e30371f2ad6517cbb94674083, < d5403ae28085761d58b555645bc7d5feadb10073; >= ea2034416b54700e30371f2ad6517cbb94674083, < 1fb7f356547d9688822315cd2b205ff0bd5429b4; >= ea2034416b54700e30371f2ad6517cbb94674083, < 426cd8eedac89b86148d4478990eeef16e8a2520; >= ea2034416b54700e30371f2ad6517cbb94674083, < 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b
LinuxLinux2.6.37

References

Timeline

Published
Jun 26, 2026
Last modified
Jul 6, 2026
NVD status
Analyzed

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CVE-2026-53309: Critical severity, CVSS 9.8 | Vulnix