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Vulnerability record · CVE-2026-53309 · published 26 June 2026

CVE-2026-53309: Linux kernel vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.40% · top 68.5% CWE-193 · CWE-193
9.8CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
6 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b Patch
https://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4 Patch
https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845 Patch
https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520 Patch
https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194 Patch
https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54 Patch
https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52 Patch
https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53309), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.