CVE-2026-53309: ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison
Published Jun 26, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
Affected Software
9 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=2.6.37<5.10.258
Linux Linux kernel>=5.11<5.15.209
Linux Linux kernel>=5.16<6.1.175
Linux Linux kernel>=6.2<6.6.141
Linux Linux kernel>=6.7<6.12.91
Linux Linux kernel>=6.13<6.18.33
Linux Linux kernel>=6.19<7.0.10
debian/linux
6.1.176-16.1.187-16.12.94-16.12.107-17.1.13-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.187-1Fixed in 6.12.94-1Fixed in 6.12.107-1Fixed in 7.1.13-1
Event History
Jun 26, 2026
CVE Published
via MITRE·07:41 PM
Data Sourced
via MITRE·07:41 PM
DescriptionSeverity
Data Sourced
via NVD·08:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Aug 18, 2026
Data Sourced
via Launchpad·07:21 PM
Description
Sep 11, 2026
Data Sourced
via Ubuntu·04:42 PM
RemedyDescriptionSeverityAffected Software
Data Sourced
via Debian·04:43 PM
DescriptionAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-53309?
CVE-2026-53309 has a critical severity rating of 9.8.
2
How do I fix CVE-2026-53309?
To fix CVE-2026-53309, ensure you update to the latest patched version of the Linux kernel.
3
What impact does CVE-2026-53309 have on systems?
CVE-2026-53309 allows for potential memory corruption, leading to data leaks or system crashes.
4
Who is affected by CVE-2026-53309?
CVE-2026-53309 affects systems running specific versions of the Linux kernel with the ocfs2 filesystem.
5
Is CVE-2026-53309 being actively exploited?
As of now, there are no confirmed reports of active exploitation of CVE-2026-53309.