Critical 9.8Published Jun 26, 2026

CVE-2026-53309ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

Updated under an hour ago (Oct 27, 2026, 5:00 AM ET)

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Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from ea2034416b54700e30371f2ad6517cbb94674083 before 760ab35040aca8399021fdb9ff1db1089feb7194; from ea2034416b54700e30371f2ad6517cbb94674083 before c60a2710b73838d250cda57344c049b89abc5d52; from ea2034416b54700e30371f2ad6517cbb94674083 before 2a0673836f019e7c032acbf48d022d5ccf02a845; from ea2034416b54700e30371f2ad6517cbb94674083 before 819d8ebad3200a53de99bd7e297bc428e41ced54; from ea2034416b54700e30371f2ad6517cbb94674083 before d5403ae28085761d58b555645bc7d5feadb10073; from ea2034416b54700e30371f2ad6517cbb94674083 before 1fb7f356547d9688822315cd2b205ff0bd5429b4; from ea2034416b54700e30371f2ad6517cbb94674083 before 426cd8eedac89b86148d4478990eeef16e8a2520; from ea2034416b54700e30371f2ad6517cbb94674083 before 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.37 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.