Critical severity9.8NVD Advisory· Published Jun 26, 2026· Updated Jul 6, 2026
CVE-2026-53309
CVE-2026-53309
Description
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.
Affected products
3Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7bnvdPatch
- git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4nvdPatch
- git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845nvdPatch
- git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520nvdPatch
- git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194nvdPatch
- git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54nvdPatch
- git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52nvdPatch
- git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073nvdPatch
News mentions
1- Linux Kernel: 25 Vulnerabilities Affecting Networking, Graphics, and Memory Management Disclosed TogetherVypr Intelligence · Jun 27, 2026