CVE-2026-53309

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

Critical · published June 26, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
33.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00399 · 33.0th percentile
Published
2026-06-26T19:41Z
EPSS history
Timeline
  • 26 JUN 19:41Z
    ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
    cvelistv5