CVE-2026-53309: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
In the Linux kernel, the following vulnerability has been resolved:
ocfs2/dlm: fix off-by-one in dlmmatchregions() region comparison
The local-vs-remote region comparison loop uses '<=' instead of '<', causing it to read one entry past the valid range of qrregions. The other loops in the same function correctly use '<'.
Fix the loop condition to use '<' for consistency and correctness.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53309?
CVE-2026-53309 has a critical severity rating of 9.8.
How do I fix CVE-2026-53309?
To fix CVE-2026-53309, ensure you update to the latest patched version of the Linux kernel.
What impact does CVE-2026-53309 have on systems?
CVE-2026-53309 allows for potential memory corruption, leading to data leaks or system crashes.
Who is affected by CVE-2026-53309?
CVE-2026-53309 affects systems running specific versions of the Linux kernel with the ocfs2 filesystem.
Is CVE-2026-53309 being actively exploited?
As of now, there are no confirmed reports of active exploitation of CVE-2026-53309.