Bug 2493755 (CVE-2026-53309) - CVE-2026-53309 kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
Summary: CVE-2026-53309 kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() regio...
Keywords:
Status: NEW
Alias: CVE-2026-53309
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-26 21:05 UTC by OSIDB Bzimport
Modified: 2026-06-29 08:38 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-26 21:05:22 UTC
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.

Comment 1 Mauro Matteo Cascella 2026-06-29 08:34:14 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062620-CVE-2026-53309-794d@gregkh/T


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