CVE-2026-53309
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk32th percentile — higher than 32% of all known CVEs
Summary
In the Linux kernel, an off-by-one vulnerability was found in the OCFS2 file system's dlm_match_regions() function. The loop comparing local and remote regions uses '<=' instead of '<', causing a read beyond the valid range of the qr_regions array. Other loops in the same function correctly use '<'.
Risk Assessment
The risk involves a potential out-of-bounds memory read, which could lead to unexpected system behavior, information disclosure, or kernel panic in environments using the OCFS2 clustered file system.
Recommendation
It is recommended to immediately update the Linux kernel to a version containing the fix that corrects the off-by-one error in the dlm_match_regions() function within the OCFS2 subsystem.
Original NVD description (English source)
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.