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CVE-2026-53015

24
FAUCET Score

In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], `lcn` was typed as `unsigned long` (or `unsigned int` sometimes), which is only 32 bits wide on 32-bit platforms, which causes `(lcn << lclusterbits)` to be truncated at 4 GiB. In order to consolidate the logic, just use `u64` consistently around the codebase. [1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com

First published: Jun 24, 2026Last modified: Jun 24, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.3, < 6.12.91CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.13, < 6.18.33CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.19, < 7.0.10CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.12%
Probability of exploitation in next 30 days
EPSS Percentile
2.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0012 is in the 15th percentile among its peer group of 15,940 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (32)

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-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-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 (16)

ubuntuUSN-8609-1

Linux kernel (Azure CVM) vulnerabilities

Jul 24, 2026
ubuntuUSN-8608-1

Linux kernel (Azure FIPS) vulnerabilities

Jul 24, 2026
ubuntuUSN-8607-1

Linux kernel (Azure CVM) vulnerabilities

Jul 24, 2026
ubuntuUSN-8606-1

Linux kernel (Azure) vulnerabilities

Jul 24, 2026
ubuntuUSN-8595-2

Linux kernel (AWS) vulnerabilities

Jul 24, 2026
ubuntuUSN-8603-1

Linux kernel (Azure) vulnerabilities

Jul 24, 2026
ubuntuUSN-8596-1

Linux kernel (NVIDIA) vulnerabilities

Jul 23, 2026
ubuntuUSN-8595-1

Linux kernel (Oracle) vulnerabilities

Jul 23, 2026
ubuntuUSN-8574-2

Linux kernel vulnerabilities

Jul 23, 2026
ubuntuUSN-8593-1

Linux kernel vulnerabilities

Jul 23, 2026
ubuntuUSN-8574-1

Linux kernel (GCP FIPS) vulnerabilities

Jul 21, 2026
ubuntuUSN-8569-1

Linux kernel (HWE) vulnerabilities

Jul 20, 2026
ubuntuUSN-8568-1

Linux kernel (OEM) vulnerabilities

Jul 20, 2026
ubuntuUSN-8567-1

Linux kernel vulnerabilities

Jul 20, 2026
ubuntuUSN-8566-1

Linux kernel vulnerabilities

Jul 20, 2026
microsoft2026-Jun/CVE-2026-53015Moderate

erofs: unify lcn as u64 for 32-bit platforms

Jun 9, 2026

References

git.kernel.org / stable/c/2d8c7edcb661812249469f4a5b62e9339118846f
Patch
git.kernel.org / stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253
Patch
git.kernel.org / stable/c/582b0bf201157632cb5474c885989a6ebda46521
Patch
git.kernel.org / stable/c/858e4d98a86adf34584767388deb6c9b217f70c5
Patch