CVE-2026-53309 is a vulnerability in Linux Kernel
Published on June 26, 2026
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 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.
Products Associated with CVE-2026-53309
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Affected Versions
Linux:- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 760ab35040aca8399021fdb9ff1db1089feb7194 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below c60a2710b73838d250cda57344c049b89abc5d52 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 2a0673836f019e7c032acbf48d022d5ccf02a845 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 819d8ebad3200a53de99bd7e297bc428e41ced54 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below d5403ae28085761d58b555645bc7d5feadb10073 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 1fb7f356547d9688822315cd2b205ff0bd5429b4 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 426cd8eedac89b86148d4478990eeef16e8a2520 is affected.
- Version ea2034416b54700e30371f2ad6517cbb94674083 and below 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b is affected.
- Version 2.6.37 is affected.
- Before 2.6.37 is unaffected.
- Version 5.10.258, <= 5.10.* is unaffected.
- Version 5.15.209, <= 5.15.* is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.141, <= 6.6.* is unaffected.
- Version 6.12.91, <= 6.12.* is unaffected.
- Version 6.18.33, <= 6.18.* is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.