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
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 152a333a589560bee002e4c96761f1b560a5793c, < d142250132454bf86cba87018fb2d29c482dacd6; >= 152a333a589560bee002e4c96761f1b560a5793c, < 18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c; >= 152a333a589560bee002e4c96761f1b560a5793c, < 4fc9b12e43a3f19a01a8fb61f7961be79de20253; >= 152a333a589560bee002e4c96761f1b560a5793c, < 858e4d98a86adf34584767388deb6c9b217f70c5; >= 152a333a589560bee002e4c96761f1b560a5793c, < 582b0bf201157632cb5474c885989a6ebda46521; >= 152a333a589560bee002e4c96761f1b560a5793c, < 2d8c7edcb661812249469f4a5b62e9339118846f |
| Linux | Linux | 5.3 |
References
- https://git.kernel.org/stable/c/18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c
- https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846fPatch
- https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253Patch
- https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521Patch
- https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5Patch
- https://git.kernel.org/stable/c/d142250132454bf86cba87018fb2d29c482dacd6
Timeline
- Published
- Jun 24, 2026
- Last modified
- Oct 30, 2026
- NVD status
- Modified