CVE-2026-53309
published 2026-06-26CVE-2026-53309: 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…
PriorityP346critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.40%
32.5th percentile
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
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 760ab35040aca8399021fdb9ff1db1089feb7194 | 760ab35040aca8399021fdb9ff1db1089feb7194 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < c60a2710b73838d250cda57344c049b89abc5d52 | c60a2710b73838d250cda57344c049b89abc5d52 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 2a0673836f019e7c032acbf48d022d5ccf02a845 | 2a0673836f019e7c032acbf48d022d5ccf02a845 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 819d8ebad3200a53de99bd7e297bc428e41ced54 | 819d8ebad3200a53de99bd7e297bc428e41ced54 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < d5403ae28085761d58b555645bc7d5feadb10073 | d5403ae28085761d58b555645bc7d5feadb10073 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 1fb7f356547d9688822315cd2b205ff0bd5429b4 | 1fb7f356547d9688822315cd2b205ff0bd5429b4 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 426cd8eedac89b86148d4478990eeef16e8a2520 | 426cd8eedac89b86148d4478990eeef16e8a2520 |
| linux | linux | >= ea2034416b54700e30371f2ad6517cbb94674083 < 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b | 01b61e8dda9b0fdb0d4cda43de25f4e390554d7b |
| linux | linux_kernel | >= 2.6.37 < 5.10.258 | 5.10.258 |
| linux | linux_kernel | >= 5.11 < 5.15.209 | 5.15.209 |
| linux | linux_kernel | >= 5.16 < 6.1.175 | 6.1.175 |
| linux | linux_kernel | >= 6.13 < 6.18.33 | 6.18.33 |
| linux | linux_kernel | >= 6.19 < 7.0.10 | 7.0.10 |
| linux | linux_kernel | >= 6.2 < 6.6.141 | 6.6.141 |
| linux | linux_kernel | >= 6.7 < 6.12.91 | 6.12.91 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vendor_redhat9.8CRITICAL
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VulDB
Linux Kernel up to 7.0.9 ocfs2 dlm_match_regions off-by-one
vuldb·2026-06-26
CVE-2026-53309 [CRITICAL] Linux Kernel up to 7.0.9 ocfs2 dlm_match_regions off-by-one
A vulnerability labeled as critical has been found in Linux Kernel up to 7.0.9. This affects the function dlm_match_regions of the component ocfs2. Executing a manipulation can lead to off-by-one.
This vulnerability appears as CVE-2026-53309. The attack may be performed from remote. There is no available exploit.
The affected component should be upgraded.
GHSA
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
ghsa_unreviewed·2026-06-26
CVE-2026-53309 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
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.
Red Hat
kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
vendor_redhat·2026-06-26·CVSS 9.8
CVE-2026-53309 [CRITICAL] CWE-125 kernel: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
kernel: 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.
A flaw was found in the Linux kernel's OCFS2 Distributed Lock Manager (DLM) component. An off-by-one error in the `dlm_match_regions()` function's region comparison loop causes it to read beyond the valid memory range of `qr_regions`. This out-of-bounds read could lead to system instability or crashes.
Package: kernel (Red Hat E
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7bhttps://git.kernel.org/stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4https://git.kernel.org/stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845https://git.kernel.org/stable/c/426cd8eedac89b86148d4478990eeef16e8a2520https://git.kernel.org/stable/c/760ab35040aca8399021fdb9ff1db1089feb7194https://git.kernel.org/stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54https://git.kernel.org/stable/c/c60a2710b73838d250cda57344c049b89abc5d52https://git.kernel.org/stable/c/d5403ae28085761d58b555645bc7d5feadb10073
2026-06-26
Published