CVE-2026-53309

42

FAUCET Score

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.

First published: Jun 26, 2026Last modified: Jun 28, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 2.6.37, < 5.10.258CPE matchmatch criteria	cpe:2.3:o:linux:linux_kernel::::::::
		>= 5.11, < 5.15.209CPE matchmatch criteria	cpe:2.3:o:linux:linux_kernel::::::::
		>= 5.16, < 6.1.175CPE matchmatch criteria	cpe:2.3:o:linux:linux_kernel::::::::
		>= 6.2, < 6.6.141CPE matchmatch criteria	cpe:2.3:o:linux:linux_kernel::::::::
		>= 6.7, < 6.12.91CPE matchmatch criteria	cpe:2.3:o:linux:linux_kernel::::::::

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.40%

Probability of exploitation in next 30 days

EPSS Percentile

32.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0040 is in the 9th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (47)

ubuntupatch availablevia ubuntu_usn

Product: linux-hwe-7.0 (noble)Fixed in: 7.0.0-28.28~24.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-oem-7.0 (resolute)Fixed in: 7.0.0-1009.9

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp-6.8 (jammy)Fixed in: 6.8.0-1064.72~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-realtime-6.8 (jammy)Fixed in: 6.8.1-1056.57~22.04.2

ubuntupatch availablevia ubuntu_usn

Product: linux (noble)Fixed in: 6.8.0-136.136

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp (noble)Fixed in: 6.8.0-1064.72

ubuntupatch availablevia ubuntu_usn

Product: linux-gke (noble)Fixed in: 6.8.0-1059.67

ubuntupatch availablevia ubuntu_usn

Product: linux-gkeop (noble)Fixed in: 6.8.0-1046.50

ubuntupatch availablevia ubuntu_usn

Product: linux-realtime (noble)Fixed in: 6.8.1-1056.57

ubuntupatch availablevia ubuntu_usn

Product: linux (resolute)Fixed in: 7.0.0-28.28

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp (resolute)Fixed in: 7.0.0-1008.8

ubuntupatch availablevia ubuntu_usn

Product: linux-gke (resolute)Fixed in: 7.0.0-1003.4

ubuntupatch availablevia ubuntu_usn

Product: linux-realtime (resolute)Fixed in: 7.0.0-28.28.1

ubuntupatch availablevia ubuntu_usn

Product: linux-nvidia-tegra-5.15 (focal)Fixed in: 5.15.0-1064.66~20.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-hwe-5.15 (focal)Fixed in: 5.15.0-186.196~20.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-lowlatency-hwe-5.15 (focal)Fixed in: 5.15.0-184.194~20.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux (jammy)Fixed in: 5.15.0-186.196

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp (jammy)Fixed in: 5.15.0-1112.122

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp-fips (jammy)Fixed in: 5.15.0-1112.122+fips1

ubuntupatch availablevia ubuntu_usn

Product: linux-gke (jammy)Fixed in: 5.15.0-1108.114

ubuntupatch availablevia ubuntu_usn

Product: linux-gkeop (jammy)Fixed in: 5.15.0-1095.103

ubuntupatch availablevia ubuntu_usn

Product: linux-kvm (jammy)Fixed in: 5.15.0-1104.109

ubuntupatch availablevia ubuntu_usn

Product: linux-lowlatency (jammy)Fixed in: 5.15.0-184.194

ubuntupatch availablevia ubuntu_usn

Product: linux-realtime (jammy)Fixed in: 5.15.0-1111.120

ubuntupatch availablevia ubuntu_usn

Product: linux-xilinx-zynqmp (jammy)Fixed in: 5.15.0-1075.79

ubuntupatch availablevia ubuntu_usn

Product: linux-gcp-fips (noble)Fixed in: 6.8.0-1064.72+fips1

ubuntupatch availablevia ubuntu_usn

Product: linux-nvidia-6.8 (jammy)Fixed in: 6.8.0-1059.62~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-nvidia (noble)Fixed in: 6.8.0-1059.62

ubuntupatch availablevia ubuntu_usn

Product: linux-nvidia-lowlatency (noble)Fixed in: 6.8.0-1059.62.1

ubuntupatch availablevia ubuntu_usn

Product: linux-oracle-6.8 (jammy)Fixed in: 6.8.0-1058.61~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-lowlatency-hwe-6.8 (jammy)Fixed in: 6.8.0-136.136.2~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-fips (noble)Fixed in: 6.8.0-136.136+fips2

ubuntupatch availablevia ubuntu_usn

Product: linux-lowlatency (noble)Fixed in: 6.8.0-136.136.2

ubuntupatch availablevia ubuntu_usn

Product: linux-oracle (noble)Fixed in: 6.8.0-1058.61

ubuntupatch availablevia ubuntu_usn

Product: linux-ibm (resolute)Fixed in: 7.0.0-1010.10

ubuntupatch availablevia ubuntu_usn

Product: linux-oracle (resolute)Fixed in: 7.0.0-1008.8

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-fde (jammy)Fixed in: 5.15.0-1117.126

ubuntupatch availablevia ubuntu_usn

Product: linux-azure (jammy)Fixed in: 5.15.0-1117.126

ubuntupatch availablevia ubuntu_usn

Product: linux-oracle (jammy)Fixed in: 5.15.0-1109.115

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-fde-6.8 (jammy)Fixed in: 6.8.0-1062.69~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-fips (noble)Fixed in: 6.8.0-1063.71+fips2

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-fde (noble)Fixed in: 6.8.0-1062.69

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-6.8 (jammy)Fixed in: 6.8.0-1063.71~22.04.1

ubuntupatch availablevia ubuntu_usn

Product: linux-azure (noble)Fixed in: 6.8.0-1063.71

ubuntupatch availablevia ubuntu_usn

Product: linux-aws (noble)Fixed in: 6.8.0-1061.64

ubuntupatch availablevia ubuntu_usn

Product: linux-azure (resolute)Fixed in: 7.0.0-1010.10

ubuntupatch availablevia ubuntu_usn

Product: linux-azure-fde (resolute)Fixed in: 7.0.0-1009.9

Vendor Advisories (20)

ubuntuUSN-8610-1

Linux kernel (Azure CVM) vulnerabilities

ubuntuUSN-8575-3

Linux kernel vulnerabilities

ubuntuUSN-8609-1

Linux kernel (Azure CVM) vulnerabilities

ubuntuUSN-8608-1

Linux kernel (Azure FIPS) vulnerabilities

ubuntuUSN-8607-1

Linux kernel (Azure CVM) vulnerabilities

ubuntuUSN-8606-1

Linux kernel (Azure) vulnerabilities

ubuntuUSN-8595-2

Linux kernel (AWS) vulnerabilities

ubuntuUSN-8603-1

Linux kernel (Azure) vulnerabilities

ubuntuUSN-8596-1

Linux kernel (NVIDIA) vulnerabilities

ubuntuUSN-8595-1

Linux kernel (Oracle) vulnerabilities

ubuntuUSN-8574-2

Linux kernel vulnerabilities

ubuntuUSN-8593-1

Linux kernel vulnerabilities

ubuntuUSN-8576-1

Linux kernel (NVIDIA Tegra) vulnerabilities

ubuntuUSN-8575-1

Linux kernel vulnerabilities

ubuntuUSN-8574-1

Linux kernel (GCP FIPS) vulnerabilities

ubuntuUSN-8569-1

Linux kernel (HWE) vulnerabilities

ubuntuUSN-8568-1

Linux kernel (OEM) vulnerabilities

ubuntuUSN-8567-1

Linux kernel vulnerabilities

ubuntuUSN-8566-1

Linux kernel vulnerabilities

microsoft2026-Jun/CVE-2026-53309Critical

ocfs2/dlm: fix off-by-one in dlm_match_regions() region comparison

References

git.kernel.org / stable/c/01b61e8dda9b0fdb0d4cda43de25f4e390554d7b

Patch

git.kernel.org / stable/c/1fb7f356547d9688822315cd2b205ff0bd5429b4

Patch

git.kernel.org / stable/c/2a0673836f019e7c032acbf48d022d5ccf02a845

Patch

git.kernel.org / stable/c/426cd8eedac89b86148d4478990eeef16e8a2520

Patch

git.kernel.org / stable/c/760ab35040aca8399021fdb9ff1db1089feb7194

Patch

git.kernel.org / stable/c/819d8ebad3200a53de99bd7e297bc428e41ced54

Patch

git.kernel.org / stable/c/c60a2710b73838d250cda57344c049b89abc5d52

Patch

git.kernel.org / stable/c/d5403ae28085761d58b555645bc7d5feadb10073

Patch