CVE-2026-53015
erofs: unify lcn as u64 for 32-bit platforms
Description
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
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 15, 2026, 1:55 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to the latest version.
- Ensure proper data type handling for lcn.
- Compile the kernel with u64 types.
- Apply the provided patch.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53015.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53015 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53015
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53015 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53015 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.3 up to (excluding) 6.12.91 Added Reference Type kernel.org: https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5 Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '152a333a589560bee002e4c96761f1b560a5793c', 'lessThan': '4fc9b12e43a3f19a01a8fb61f7961be79de20253', 'versionType': 'git'}, {'status': 'affected', 'version': '152a333a589560bee002e4c96761f1b560a5793c', 'lessThan': '858e4d98a86adf34584767388deb6c9b217f70c5', 'versionType': 'git'}, {'status': 'affected', 'version': '152a333a589560bee002e4c96761f1b560a5793c', 'lessThan': '582b0bf201157632cb5474c885989a6ebda46521', 'versionType': 'git'}, {'status': 'affected', 'version': '152a333a589560bee002e4c96761f1b560a5793c', 'lessThan': '2d8c7edcb661812249469f4a5b62e9339118846f', 'versionType': 'git'}], 'programFiles': ['fs/erofs/zmap.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/erofs/zmap.c'], 'defaultStatus': 'affected'}] Added Description 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 Added Reference https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f Added Reference https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253 Added Reference https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521 Added Reference https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5